I've been looking for a discussion about this, to see how people feel about a 180 button.
http://forum.rocketbaba.com/index.php?topic=211.0September '09 I made a 180 button on autohotkey and asked the BLR TDM server forum if they thought it was okay or not.
There's several demos, I took a demo every time I used it; and some debate about it there.
By mid-October i deleted it.
I found it to be mostly useless: by turning manually we get to see every frame in between, able to check the entire area for anticipated violence. To blink a 180 blinds us to what's in between and gets us sniped by what our ears failed to pick up.
I found myself thinking 'I wish I had a SPAS' more times than I've wanted this back.
And I've never wished for a SPAS.
I don't see it a cheat in the least, but in this wild, google-recommends-hacks-when-you-type-'Urban Terror'-in-search, and Everyone's a suspect hysteria: it's really not in your best interest to be 'snapping' automajicaly, is it?
I wonder if that nifty Passport thinger would detect it as a cheat.