Stealing (not from a chest)

So I went over to a "friend's" house and logged onto my MC account there. I forgot to uncheck remember password. Is it a bannable offense if they logged onto my account and stole my diamond armor and tools?

 

you complained about stealing not from a chest but it was a lie, first spamming chat now the forums

 

I have no idea what you're talking about dude. I didn't say anything about it in chat. You have me mistaken for somebody else.

 

this is not a server problem.
you basically gave your 'friend' your password, thus the problem is between you and him.