hi admin, i have just registered an account and now i dont use it, so next months it will be locked?
You are confusing banned and locked accounts. If you will spam and violate rules, your account will be banned (temporary or permanently).
Usually accounts getting locked when someone hack it. When someone change email address on account, original owner get message to email with option to lock accounts. Only admin can activate account again.
Also, many accounts which was registered before Bitcointalk database hack in 2015 are also locked.
Your account will only get locked if you get banned or reset your password via secret question.
good luck