I did changed my password twice this week, but I don't see how it could be an issue.
I am pretty sure something is wrong with the security question feature.
If you are 100% sure that it didn't get locked via the email and got banned instead. Then it's probably due to the posts that the accounts have made or pms that it has been sending.
AFAIK you can change your password as many times as you want and you won't get banned for it. The security question is a feature which isn't recommended to be used because it's easier to guess than a password. It won't lock the account though.
Include the username here and maybe a staff member could shine some light on why the account is banned/locked.
My account name is: pedrojok
Like a couple of weeks old, and maybe 6 or 7 posts ! Hope I didn't get banned for so little !!!
I agree with you, you can't get banned for changing your password, that wouldn't make any sens. But that is pretty much what happened, and so the reason why I opened this topic. Something went wrong, and if there is an issue, hopefully it can be fixed, so it doesn't happen to other.