That seems pretty silly to me. What makes one ship more "suspicious" than other? All ships can be used for any activities -- hell, if anything, Belugas and Orcas should be the most "suspicious" ships in the game. Why? Because you'd think that cops would get smart pretty quick about how frequently criminal masterminds go on sight-seeing missions...
Wow, you're right. I have never been scanned in an Asp Scout. Even though I've never flown one, I'd say that's theory confirmed. [alien]
I know you're just joking but an arbitrary scale for ship "conspicuousness" is pretty silly. Whether or not you're likely to get scanned should be based off how you're flying. Are you flying suspiciously (boosting for the slot and popping heatsinks like they're pez candy)? "Well, my friend, that's pretty sketchy behavior so why don't we see what you're carrying?"