Venator
Anti-Saldana Freedom Fighter
If I were to see someone that wasn't in a uniform with a thigh rig I would think that it was odd. I would also expect many people to be startled by it (which could lead to a few more MWAG calls) and I would expect antis to fearmonger about it. But I also think that it can help bring awareness to the cause and can help so long as you have thought about your answers beforehand and they are reasonable (things like easiest way to OC in the winter, or good accessibility while sitting, etc). And remember, if no one uses that type of holster then it can't ever come to be viewed as "normal" or "acceptable" to the general public.
So ultimately I think that it will come down to how you handle any situation that arises for if it will be helpful or harmful. But I would expect it to draw more attention than a "traditional" holster.
Well the same things were projected just for hip OC...startled, not in uniform, scared, etc...
I know people that wear thigh rigs and they don't seem to have any more problems with it and get about the same reaction as OCing with a hip holster. The only way to get people used to something is to expose them to it. As always it's more the person than the holster.