They’re nickle and dime guys, they’ll probably get busted at some point but it’ll be dimebag stuff. If the DEA was going to hassle them based on known associates that already happened, remember Walt was gone for months, plenty of time to find out Badger and Skinny Pete are morons who don’t know anything even about things that involved them. Even if they did talk what would they say “Walt drove us to a house we don’t remember how to get to (because they’re stoners) and we shined laser pointers in the window at people we don’t know who they are”?
Also remember that the Schwarzes had offered to take care of Walt’s family when they found out he was sick. Walt’s ego wouldn’t allow that, the same ego that had him insisting all fees had to come out of his money, but they want to help the kids. So one way or the other they’ll help the kids, the only real question is will they follow all Walt’s stupid rules to only do it with his money or will they just go ahead and do it.
Jesse’s DNA and fingerprints are all over the NN compound. Won’t they hunt him down?