Huh! I was aware about the mod that replaces it with what I think is a Mirelurk queen, but the other two -- especially the "cage trap" one -- is new to me! And it doesn't really spawn them other places -- one of the DLCs for Fallout 4 added the ability to "trap" creatures in cages, but what it really does is just spawn the creature inside of it after a set period of time if you can build and bait the cage. Some are hostile and need to be pacified with a certain piece of equipment, others aren't.

Yeah, I know. Just be careful if you do end up going down that route -- I'm sure you know something about how buggy Bethesda code is!