Banned for helping

Hello there.. My concern is a good freind of mine was recently banned for using his credit card to get another freind in the game.. the freind that he had gotten in the game had be suspected of falsly using someone else's credit card to do something on SL and has had his account terminated.. Tho i feel that that was justified, I'm confused where the person who had initially used his card to connect that freind to SL had his account recently suspended. Possibly deleted. This was all on the bases that he knew the other person involved.. My freind had a good amount of money in his account and had been following the rules and I worry that by helping someone out initially makes you responsible for there actions. even tho they had set up there own credit card and done there own thing for probly over a year i'd assume. I've helped alot of ppl get onto sl in the years paying the fee that was needed to join when it was there. Should i be worried about this? And why is a freind that is more then 300 miles away from the accused have his account suspended or deleted when he's worked hard on this game and has many freinds on there who like him. He's not done anything wrong.. and as a result does he loose everything he's had vested in the game? Please help me to figure this all out and maybe help a freind who is being wrongly accused..

Thanks.
Sheppard Drago