i dunno, i wouldn't call it stalking..
as 'ti's are a real rarity here (6 1.8's, 1 1.8 conversion, about 20 1.6s), whenever i find one i follow em around to figure out what kind of driver they are. unfortunately, most end up being either a) chicks in 316s (not a bad thing really) or b) old guys that crash the hell out of their 316s. Of the few 318ti's here, i personally have met about half of the other owners. thank god all us 318ti's here are enthusiasts (and by that i mean we drive the cars hard and keep em in good shape).
one time a chick in a red 316 like me just sat there smiling, staring and pointing to her friend as I drove by with this big grin on my face. i must say, chicks really must love 316's because about 75% of the ones i run into have women behind the wheel.
anyways, did the guy come back? did he at least peel out and haul major ass when you busted him? why didn't you chase after him? Good Lord, man, get it together!!