Preferred method of carry is a very personal thing. If it is something of value to me then my preference wouldn't be to put it outside a pocket on a belt unless I also had a backup lanyard attached to a belt loop or something similar. For me, it's just too easy for it to get knocked off and damaged when it hit the ground, or worse, lost. I don't have this light but my LiteFlux LF2XT always rides inside my pocket even though it has a (very thin) clip with a very short lanyard attached (for attaching to my bicycle helmet). It's so small I frequently check to make sure it's still there.
I second what GeoBruin said, "... just test it", in your pocket. If it comes on for you and you don't want to unscrew the tail cap then try your preference between a rubber o-ring (soft "touch" when using switch) or a metal ring - split ring - thin washer (better visual match but maybe rougher "touch" around the switch).
Let us know what you come up with.