As an ex-member of both BHPA (Hang Gliding) and BMAA (Microlight) I must admit I'm quite enjoying NOT being a member of any organisation or association at the moment (this forum excluded!). I also quite like being taught by an independent instructor too.
However, when I was (much) younger the warm feeling I got from knowing I was being taught to HG by 'qualified' instructors was quite important and I imagine that may be the same for some flying novices when learning PPG. I guess PPG is different for a lot of us as we come from other forms of aviation so we are possibly happier to judge the quality of our instruction (if we have any) for ourselves, rather than relying on the certificates he/she has on the wall.
Having said all that, I don't have anything against membership of a suitable organization if it's main focus is PPG, which is why I voted for 'start from scratch'. I remember when the accuracy paracending clubs joined the BHPA and immediately became a very under-represented minority in an association whose main focus was HG and PG, always made me wonder why they joined?
Mark.