Sounds reasonable, I hate it when people let family members know their acc details, and then you log in to play some arena just to end up failing because your partner isn't your partner, but really his little brother.
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My ban story:
I was rolling a night elf rogue as usual, on a random instant 80 funserver with a mall. Everything in the mall cost gold, and I found it a choir to get money, so instead of getting money, I bought and resold a specific item over and over again.
A GM suddenly appears, asking me where I'm getting my money from, and I told him, I'm selling equipments. He says "Oh, alright. Thank you." and disappears.
When I finished gearing up my character, I go and skill up my weapon skill (it wasn't a fast skill up, but I knew of a way to speed it up), I then go to the arena. And much to my joy, no ones playing melee characters (probably because of the slow skill up).
I start tearing everyone up with 7-8k ambush crits, eventually, people start calling me a hacker (even though I wasn't using any hacks or exploits). I ask them why, and they blame it on the fact that I was using ambush outside of stealth. A GM (the same one as before) appears after a while, and asks me why I'm "ambush-hacking"...
I answer and refer him to a talent called Shadow Dance: Shadow Dance - Spell - World of Warcraft
He claims I'm lying and tells me, he knew I was a hacker and permabans me. :P I really wanted to punch that retard in the face, not for banning me but for him being such a ****ing retard. argh.