"Sorry nevsky, you are banned from using this forum! For security, your account has been locked. Email
locked...@bitcointalk.org" Yes, maybe the reason is in the signature campaign. Thank all for help guys!
After looking through the post history of the banned account. My bet is on spamming which you did when participating in the cryptotalk campaign. You even went ahead and caused quite a scene after realizing that you got banned from the campaign.
You probably got the attention you wanted from the mods.