Asshat has repeatedly said that discipline (or at least, typical conventional discipline) doesn't work with Abbie because she doesn't understand it, doesn't get it, and will think it's funny. Thing is, he and Princess P don't do even modified discipline either. I believe in one video Asshat said that they best they can do is ignore it when she acts up and hope she gets bored of it. He brought up the whole reinforcing the behaviors thing, that if they stop and tell her no or don't do that, whatever... Abbie sees it as them engaging w. her and she enjoys it. You're right that A&P and Abbie would tremendously benefit from teaching her discipline. A&P are just shooting themselves in the foot by not doing it.
Also like...if giving her attention just reinforces bad behavior, then attention is something she sees as a reward...meaning she likes it. Has it not occurred to them that maybe if they paid more attention to her and engaged in activities she liked, she would be too occupied to get into trouble, and also wouldn't be so desperate for attention that even negative attention feels like a reward to her?
I mean Lord, every interaction she has with them is "Sweet Girl, do this...now do that...look over here...go over there...no not there, over there...over
there...do you like this? You keep saying no, but you mean yes...not no...yes! What do you want to do? We can't do that, pick something else...we can't do that, pick something else...we can't do that, pick something else...how about Dunkin? We can go to Dunkin. Want to take a ride in the cart to Dunkin? No, that's not what a thumbs-up looks like...do it like this. Now sign 'cart.' Now sign 'donut.' Good job! What do you want to eat? We're not eating that, pick something else...we're not eating that, pick something else...we're not eating that, pick something else...how about Zaxby's? We can eat Zaxby's. Awesome job, you picked Zaxby's! Give me a hug. Tighter. Tighter. Go? No, we're not going anywhere right now. No, we're not going anywhere right now. No, we're not going anywhere right now. Oh wait, do you want
me to go? Okay, I'll go...but wait, first say hi to the camera. You have to go to the bathroom? Then go. No, you can't eat, you just ate. No, you can't have a bath. Let's show them how you make brownies, Sweet Girl."