My account was suspended today for this very reason (apparently). The only thing I did was retweet something that mentioned a couple of other people in it, therefore my tweet had three user accounts mentioned.
However, I am unable to unsuspend my account because the form where you select the checkboxes saying ‘I won’t do x and y’, enter a captcha and hit ‘submit’, just returns me to my homepage and gives the error message “You are already logged in. Log out and try again.”
It also says this irrespective of whether I select the checkboxes, or put the correct captcha answer in, or no captcha answer at all even. This is quite frustrating since my account behaviour is exactly the same as it was previously.