It allows you to synchronize subscriptions, blocks, and profile settings between accounts.
(though FYI different versions only gracefully handle a specific API version at a time so there's some limitations right now as instances upgrade from 0.18.2 to 0.18.3 - see my comment here: https://lemmy.ml/comment/2094948 )
EDIT: Second link isn't working - must be a Lemmy bug. But you can see it as a recent post on my profile.
There's no official way that I know of. I believe it's in the backlog of desires features on both Lemmy and Kbin. I will say it may be longer until there's a migration between the two platforms, but there are some unofficial migrations out there between two accounts utilizing the same platform (like one Lemmy instance to another or one kbin instance to another).
I'm not who you're replying to, but I have accounts on a handful of instances for this very reason. Sometimes things go down or get laggy, and I just hop to a different instance.
That's entirely up to you, it can be the same username if you want. Speaking as an instance admin, there is no problem with users creating multiple accounts across instances, even if they're the same username.
Spam would be creating as many usernames as you can on any given instance (e.g. trying to register 100 users on lemmy.world because reasons) - there's obviously a problem with that. Creating you@instance1, you@instance2 and you@instanceN is perfectly fine.
each instance has its own user base, charlie@instance and charlie@otherinstance are not guaranteed to be the same person any more than @charlie at twitville and @charlie at ig.
I mean, it'd be similar in validity as charlie@outlook.com pretending to be charlie@gmail.com. Yeah, it'll fool some people, but easily checked if you keep your head about you.
The difference is that ActivityPub clients currently only display the username part and hide the host for some reason. This can lead to confusion, I don't get why the full address isn't displayed by default.
Email does that too. It's even worse, you can make "support@microsoft.com" show up but it's really badguy@somewhereelse.com. Granted, many emails hosts are getting better at flagging these, but one can still click the name to confirm on Kbin or Lemmy.
It's already happening. I saw a sh.itjust.works user impersonating a lemmy.world admin and presenting opposite positions to what that lemmy.world admin believed. I use keyoxide to help provide confirmation that yes, @Cube6392@beehaw.org and @Quill7513@slrpnk.net are the same person, both of them are me, don't panic.
I mean slightly bad example since Microsoft migrated a bunch of their hotmail users to outlook addresses hahahaha. But yeah. I especially feel that way about people who want all !news communities to just be aggregated together when that doesn't actually make sense when you think about it for more than a second. !news@beehaw.org and !news@ttrpg.net don't actually have much in common, in terms of what they're about. I know !news@ttrpg.net doesn't actually exist, but it feasibly could exist as a community for discussing table top role playing game news, like if Dungeons and Dragons has a big new release of material or something
There are no requirements, and they wouldn't be enforceable even if somebody tried. The admin of instance1 has no way of knowing that you already have an account on instance2. Your identifiable details (IP address, e-mail address) are private to the instance that you sign up with and it would be a violation of privacy (and inherently scummy) for those to be shared between instances - they're not.
You can be anonymous on the fediverse, just like the Internet in general used to be before Facebook.
I get that, I've been "SoNick" or some variation of it for a few decades now. However, a friend of mine uses different - but thematically similar - usernames for different services, when I asked her about it she explained that as a girl on the internet she has attracted more than a few stalkers; changing up the username makes it harder for them to find her on different services.
I personally don't understand why people feel the inclination to pose as multiple accounts under different names. I used to use anonymity as revenge before I learned that it's a way to hide your accountability for things that you may have said or done controversially. I didn't make fake accounts after that. Use your name; claim that responsibility, restore your trust, and move forward. But that's my opinion and may be unpopular.
Pseudonymity has been a thing on the internet for a long time. And while it can be used to “hide from accountability,” as you put it, it can also be used for a lot of other things.
For example, I can use the platform formerly known as Twitter under one account name to follow and interact with nerdy interests, while I can use it with a different username to follow and interact with more mainstream interests. A huge benefit to this is that I can prevent the algorithm from muddying things up (too much, and at least on my end), but also, I get to separate my circles in such a way that it's a lot easier to navigate. It can be argued, however that it's at the expense of having to juggle multiple usernames which makes it way harder, but that's the price I'd gladly pay.
Not at all. You don't have to identify as yourself on every instance you have an account. It's literally a different account. You can keep a backup of all your subscriptions/follows/etc from one to the other or you can treat them as two entirely different identities. Just don't have them generate a lot of pointless traffic between each other (like arguing with yourself on a post or something).
Depends on the person. The point is, it's entirely up to you. And keep in mind you're not guaranteed to get the same name on every instance you create an account.
In the Fediverse it isn’t possible to reserve your username. I could host a server and get something like favrion@lemmy.account so it’s unreasonable to expect that users keep the same username across instances. Reddit is more anonymous than Facebook. The Fediverse is more anonymous than Reddit.