Someone registered a Facebook account under my email and got friended?

[amiga]

I have a similar experience, I was shocked to find a message to confirm my facebook account but while I didn't know facebook so, I block the account so, it is closed because I was afraid of misused of someone to my email, especially I found friend requests on my email from many people. now I regret to block it because blocking this account meant that I couldn't create any other account from this email. So, I create an account from a new email.
some people are very bad
if could enter this account and change its password and use it by your name it will be better.