Her bogeyman doesn't work in Brockton Bay, and she's not 100% indestructible (hence the missing eye). Meanwhile, GravTech created the basis for the weapon that killed both Crawler and the Siberian (who was indestructible).I'm wondering how long it's going to be before Alexandria decides that it's time for a black ops raid on Gravtec. After all, it's not like Cauldron really have any problems with breaking the law. She's got her Bogeyman, she's indestructible, and they have portals. Given her tunnel vision, I'm certain she's capable of talking herself into believing that she can get away with it if only she can go in and find the evidence of Parahuman involvement or, better yet, the actual Parahuman involved.
That's not even taking into account the stuff that she doesn't know about, such as the sensors that can detect both portals and parahumans, and constantly log all activity in the bay in a manner that allows Taylor to rewind and examine it at leisure.