Nope, it's free free and as long as you download it from their page it's legal. They may change that, but any copies that go out now are undeniably legitimate. The only requirements on them is that you obtain them from Adobe, there isn't any mention on the page of needing a license for a newer version or anything like that.
But, really, there's no harm being done to Adobe. Professionals are going to need the latest version anyways if they want to work with other people's files and non-professionals never paid for it anyways.
Any posts they might make in the forum or elsewhere aren't going to affect that. If they really don't want people to have the copies free they would at least post that requirement on the download page.