The issue here is less the rules around attack declarations but more about how cancer it is to kill a PoB is which is why we get quick 1 post declarations for every Core 1 PoB that shows up because you either kill it in the first few days or it will be there for the next 10 years.
I agree in a capacity that you should have contacted allies before pulling them into the declarations. But I don’t think making people write a lengthy RP post or several posts is going to make any difference other than slightly more hassle for attackers.