First of all mate welcome to the forums,

ok as its been said, playing with other peoples accounts is against the rules, and is a bannable offence, i dont think you would be too popular if you lost 2 friends accounts.

as a rule mate never give out your gameing details to anyone i know it sounds obvious but ive done it given my details to a friend so he could use my character to craft things when ever he felt, end result was perminant ban of that account, phoned up and they said its eplained in the rules so i was stuck really.

if your intrested in just trying out boxing, i would recomend first of all getting yourself 2 or 4 trial accounts, can be gotten a number of ways best one is to just mail yourself useing your main account some 10 day trial passes, this will allow you 10 days to check it out should you decide to play activateing these accounts will give you 30 days per account of free play on your main account. (if you go to account managment on the warcraft website its in their somewhere)

keep your details safe mate, you can never be too careful with them, if you are careless with them dont be supprised if somthing bad happens as it often does, ive lost 2 accounts thru not looking after my details.