I see no point for spirited drives. Especially group ones. Let see....
$180 for a trackday to drive as fast as you can in a controlled enviroment all day long. No poles, walls and definitely no DEER to hit, oil on the road etc
$460 excessive speeding ticket, maybe lose your license and car impounded. Better yet write off you $40k car while taking someone else out. (I know I'm being a bit extreme but it could happen and has happened) Seriously you can't really have fun in a STI without being at least double the speed limit anyways.
Not even about the money.... but can't imagine having my license suspended for 3months like some of the people I know have. Besides... after you've been on the track you have no urge at all to go even over the speed limit on the streets.
If you are serious about hitting some lapping days there are a bunch of guys on the board that go regularly.