I've never been hassled by the police. I have been hassled by rent-a-cops before though. Maybe it's because I drive a 16 year-old beater truck, or maybe it's because I look older than 18, but I've never been hassled by the police. It seems to me though, that sherrifs are alot cooler than police. There's one particular road I drive everyday, the speed limit is 35mph, I regularly do 45-50mph. I've passed three sherrifs and not a one has pulled me over.
The only sherrif around here you have to watch out for is one we call, "Ol' one bullet." He's the only sherrif in a nearby town, and he's been known to give tickets for 1mph over. It's hard to not speed through his town too. The speed limit on one side of town is 45mph, the speed limit on the other side of town is 45mph, and through town it's 35mph. He's real tricky too. He hides in car lots on either side of the road so you don't see him. Other times though, he'll sit right on the side of the road daring people to speed. But, it only takes maybe 2 or 3 minutes and you're through his town, so I just slow it on down to 35mph, and cruise through and I'm on my way.