For finding things for them they like!
A few examples - I showed a friend on msn some mortal kombat videos, weeks later he tells me about a game called mortal kombat and how it looks amazing and he's gonna buy it, no mention that I introduced him to it.
A friend on steam, I showed him a metal band called Tyr on youtube, months later he tells me about this great band he found out about called Tyr. No mention that I showed him first.
A friend on facebook, I showed him a band called Clutch, now he says he's a huge clutch fan. Wont say that I told him about them.
...
I'm really at the end of my tether now. I've decided that I'm no longer going to tell anyone about bands, games, movies because they wont give me any credit.
**** them.