Everyone might remember, "innocent until proven guilty".
Personally, I am a collector and only buy, and never sell (may give some to my kids, but I don't sell)
HOWEVER: if some person wanted ID and a CPL before he would sell to me, I would tell him that then there was no sale. If I want to do paperwork, I will deal with an FFL. If I purchase privately, I expect to be respected as an honest citizen.
Do I have a CPL? sure, have had for years, buy I do not believe that I am a criminal unless I prove my innocence, and I will not deal with anyone on that basis.