Meh, I don't really care. What I DO care about is seeing friends I want to play with being online, but when I want to play with them, they're idling. :/
I like to go into achievement_idle servers and push people out of the kill room. Screw up their stats, hopefully.
"You stayed alive longer as a Scout that round than your previous best: 6:24:48"
Now that there's a trading system, there's really no need for idling anymore, since there's plenty of trading servers with nice people, who are probably willing to haggle to get what you want.