So I remember coming here in 2011 when I was curious about bitcoins, but never really done anything with it.

Today I receive an e-mail saying that a moderator deleted one of my post, so I log-in here (with my old password that was publicly leaked from yahoo ages ago) and I see 7 posts from last months that seems to be someone having a legit conversation, but that's definitively not me or anyone I know:
https://bitcointalk.org/index.php?action=profile;u=41871;sa=showPosts

I just switched my password, but I'm curious why would anyone use my identity here? What good could that give them? I'm also mostly curious if there's a wallet using my e-mail address somewhere or something similar.

Thanks for any insight you can give me.