Two sins really.
The small mom and pop store that I always buy my games in had me run the shop for a half day because their son had an emergency hospital issue. I've known them for years, and I had a little time to spare (and they offered me a free *used* game), so I agreed to watch the place for a bit.
Here's my first sin (a sin for sony fans):
A father of three kids came in inquiring about the PS3. Of course, I went into the whole sales pitch about the features of the thing, going from explaining what blu-ray is, to the great exclusive games on the system. He was pretty sold on everything already, and had his wallet out, then I happened to just ask during the course of our conversation how old his kids were. He said they were ages 8, 11, and 13. Hearing this, I... well, I talked him out of buying the thing.
As much of a Sony fan I am, I didn't have it within myself to have him buy a PS3 that would destroy his budget and his family wouldn't appreciate anyway.
It was because I asked him whether his kids actually care about graphics, particular franchises, or whatnot, and he said no, they can't tell the difference. So... I told him he's much better off buying a Wii. See, I sorta liked this guy. He's a funny old man with a great personality, so I told him buying a PS3 takes a lot of financial committment, as there's no such thing as a mod chip (btw, that's going to lead to the second sin) and he's going to have to buy all his games original, and the thing is a lot more expensive.
In the end, he did buy the Wii.
Here's my second sin (a sin to the entire gaming community and to the mom and pop store):
Well, I supported someone's bid for pirated games. But hey, I did it for a reason.. I could see that the guy was already burning a hole in his pocket for this gift for his kids, and I wanted to help him out. I knew he wouldn't be able to support a PS3 in his house (and he doesn't have an HDTV either). I guess I allowed my emotions to blind my reason.
But at least he walked out happily...