I have a theory on why the Ford family won't let Rob go to rehab. Forgive me if this has already been mentioned, I haven't seen it, and I read every page, but there's been a lot of content lately, and it's easy to accidentally miss posts.
From what I understand of rehabilitation programs, there's a lot of talking, and opening up. I think it's fair to say that Rob has been pushed into a lot of this business by his family, for their own gain. What if the Fords are afraid of what Rob will say when the therapists get through to him? Who knows what secrets he's hiding.
In the crack video Ford was reportedly mumbling something about how he's supposed to be right wing. Seems like he's living someone else's life, and it's his duty just to endure it.
Also it appears that Ford unilaterally admitted to smoking crack. Now his family is desperately trying to pretend like they were not aware of this. I really think they're scared of what will come out of Rob's mouth in rehab.