See, to me, this is on the safe side of the line for two reasons:
1) You pointed out to my satisfaction that you weren't trying to cast actual homosexuality as bad. (i.e., making the distinction then implying that whatever "bad gay" is, actual gayness isn't bad)
2) Audience. You weren't trying to ruin someone's day by counting on them to take "gay" as a pejorative, but (presumably, since I never read the original comment) busting your friend's balls and trusting (appropriately, given all I know about LARS) that they knew you weren't trying to smack down gay people. LARS' gay readers presumably know your personal sense of humor, and the group's collective one, well enough to take it as intended, and to fire back as appropriate, and everyone trusts that no one is gonna get hurt. Totally different context from when we're saying "Gay!" to Chivas players hoping it'll piss them off and make them lose.
Plus: Sacha surely expects the gay chant by now. We should be able to get something new that will surprise him and that he won't be able to tune out. There are some sadistic fucks here, many of whom are really funny, and I bet we can do better
its easy, we'll just try and convince him that the confederation cup loss is his fault