Last.fm is cool. I've met some really awesome people there!
Those tag freaks are crazy sometimes, but I've just told them to back off and usually they just stay away. Of course, there are some moments when I just get annoyed with those people and just fix my tags so I don't need to look at their posts at all. Works nicely.
My account if you wish to add me, I don't mind.
My profile is completely public, because I just don't feel like hiding stuff I do from everyone. I think I have hid the Recent Activity part from others though for a reason I can't really remember at the moment. I think it was because some idiot came and posted some stupid stuff on my shoutbox. x3
One thing that annoys me is that last.fm doesn't have many Finnish users because most of my 269 friends are from other countries (mostly from the US) and it makes me feel like I'm not even a Finn anymore but on the other hand it's great that I get to use English as much as possible because I love this language so much.