ethics of playing with friends online

[iluzion]

How many of you play with friends who are less strong poker players online? Do you take it easy on them or if you don't, what happens when you take money from them? I play 1/2 and am starting to make the move to 2/4 but a buddy wanted me to play a few sessions of .5/1 with him. He is one of those "deposit $50 and hope to go big on party" kinda guys, and was down to $15ish by the time I played a game with him. Assuming its wrong to play light on him, I played my normal aggressive game, but loosened it up alot. On one hand with ATs I called his raise from the blinds, flop came with and ace and two of my suite, he had AK, there was lots of action, river brought my flush and his leading bet put him all-in. When I showed he got really pissed at me, and now, a few days later, I run into him and all I get is "you owe me money" and he wont talk to me. Is this stupid or should i have been easy on a friend like this?