How does signing up work? What do they ask in terms of your data (email, name, address, more)? I tried finding out myself but their website misbehaved for some reason.
It's been a while but I'm pretty sure it's just an email for the Ubuntu One account. Haven't ever gotten any junk mail from them so I don't even remember which email I signed up with lol
There's also the herd mentality; i.e. peeps like to up vote something that has already been up voted and down vote something that has already been down voted. I was the first to up vote; with my vote it became +2 -7. So, since then, it has received 4 up votes and 6 down votes. Which is at least an improvement.
The point I wanted to make is that there's more to it. I wouldn't simply refer to it as symptom of toxicity and call it a day.