Have to say it's the right call. It's common enough that software (jdownloader2 comes to mind) will do the conversion automatically. it'd be super trivial for a bot crawling for DMCA links to add that functionality at some point.
You can link to websites pages related to piracy. Linking to websites linking to your content (not with a 301 redirect, before you ask) is OK. In general try to keep one degree of separation between our collective groins and your links.