some points
A good discussion going on in this thead. Some things to throw into the pot...
All the above mentioned (not negotiating curb side, the grope test) are good points. I know of a fellow cruizer who got busted by LE for having an SW in the car (she was not a decoy) and trust me, they make it a living hell.
One key point is negotiating curb side. To be safe, it is best not to negotiate curbside, but (and I think this topic was discussed before in the distant past on another board) then you run the risk of "paying the SW for her time" or having the negotiations go sour. I had my experiences where the SW got into my car and when I decided to go with her, she turned ballastic (demanding a $20 fee for her time, etc). At least with curbside negotiations, you are step on the gas if you don't get a good vibe from her.
Anyways, I haven't been cruizing for such a long time now, due to the lack of a good street scene and SW selection.