The small size of the SC30 is definitely a big appeal of the light, but I think the strobe isn't really fast enough to be good for the things an LEO would be using it for.
The regular Quarks on the other hand, have a very rapid strobe that is quite attention getting... I use mine at night when out for a walk, and it never fails to get drivers' attention to let them know where I am. When walking against the flow of traffic and dealing with drivers doing the looking left while turning right thing, none ever fail to see me coming with it, and most actually back up to clear the sidewalk. I think they think that only a cop would have a light with such a strobe, and try to get out of the way as a result.