It's because of the gay crap back in the 80's. The scouts got a real black eye from that. That's why Edward will never be part of it. Education is the second best way to prevent it. Not taking part is the best.
Don't get me wrong. I was in it for 5 years growing up. We had this kick a$$ Copenhagen chewing scout master that packed heat on every camping trip for a while. We happened across a rattlesnake hiking the Mogollon rim in AZ. He shot and killed it and it was around his cowboy hat the next morning. We had a couple of pieces of crap leaders too that should have been screened before let in.
I had a fairly good experience with the scouts, but I can and will pass down everything I learned on to Edward without the assistance of a pedophile.
In 1991 the BSA officially banned openly homosexual people from being part of the organization, but it has been fought many times.
The policy since 2000 now is pretty much "don't ask, don't tell". Screw that. Edward will NOT be in it.
http://en.wikipedia.org/wiki/Boy_Scouts_of_America_membership_controversies