It's all still anecdotal but I have known white friends and fellow students get away with all sorts of shit that I wouldn't even try with a cop. There was one guy who would, upon seeing a gaggle of cops, walk up and enquire where the nearest Dunkin Donuts was. Another used to give a Kumar (of Harold and Kumar) like lecture about why the man confronting him ended up in his current station. I got the feeling (based on other incidences and the gifts offered to me by cops in return for any question I raised) that I would suffer a similar fate as Kumar if I were to imitate such behaviour.
--ravi
-- Anyone who takes an effort to intellectually challenge the status quo and established habits is infinitely more venerable than hacks defending that status quo and established habits, regardless of the truth function of their propositions. -- W.Sokolowski