Yes, factions could buy sixteen cloaks to get around a blocking base and use those to engage the POB, but why on earth should they? Why do they have to spend hours of their lives getting rid of something that offers no positive gameplay experience to anyone?
You think sieges are positive for activity? Sure, they get people to log, but I don't think sixteen people sitting AFK alt-tabbed firing cerbs at a station is necessarily engaging or quality activity. Neither is trying to deal with incredibly frustrating bases that only seek to make it more difficult for people to interact. And then, when that base gets destroyed (INSTEAD OF BEING MOVED), both sides end up with an activity slump, because one just had to sit around for HOURS to blow up a base, and the other just lost one of their largest investments.
I've been crafting a post on this for some time, but it turns out anxiety does a lot of things to your motor skills that make it a lot harder to type and think properly. TL;DR oh god please no