No.
Bear in mind that I'm relatively new to knowing/accepting that I'm HFA.
I did browse their site today, and read up on them. I read about some of their advocacy issues, I took a cursory glance at their board of directors, looked at their mission statement & financials, etc. By the way, that last bit, their financials... they're awful. It's quite poorly managed. It's not the worst I've seen, but for a national organization their fundraising numbers seem pretty darn bad. If you don't want to dig through their filings you can go to http://www.charitynavigator.org/ and look them up. I read it in response to the one guy's very public resignation.
I'd need to see more specifics about ABA to know if I specifically want to actively oppose that or not. Admittedly I researched ABA only lightly, and only because it seemed to feature so prominently in Autism Speaks' advocacy agenda. It was all over their website.
It appears that ABA has its roots in Behavioral psychology. However the new name for this branch, Applied Behavioral Analysis, instantly sent up a red flag for me. Its one of those things that looks like someone is intentionally trying to hide something with an obscure title.
If anyone has links for ABA information and specifics of how this is applied in treatment of autistic people that would be appreciated. It's on my agenda to read up on. My knee-jerk reaction is that it's one thing to do a post-event analysis and deconstruction--this is the method I used auto-didactically to become functional--it's another to apply an electrical shock when the 17 year-old me tells a gal I like her cleavage.
Informally, to my eye, this group appears to be composed of tag-along money-grubbers, a few people genuinely trying to advocate, and a plethora of panicky parents looking to "fix" their kids. In my experience, people in a panic don't make good decisions.
Edit: Wow! I wrote my response before looking at the results. I'm guessing my info & assumptions are not far off the mark.