having worked in fish stores, I can say most people wouldn't listen to the warnings. we had 2 caimans (yes those caimans) for sale and everyone wanted to buy them. we had sharks. people would stick their fingers in the tank and be shocked when they got bit.
I have a softie tank and I am ok with invasive coral (and actually like most of them)because I like a mature reef look. I am impatient with the small coral frags puttied all over the rock. When invasive species are up against each other they help keep each other in check, ha ha.
I do have a sump full of rock that I can switch out if something does grow beyond it's boundaries so that helps.
Basically any coral that can and will spread like a plague. You gotta be ready and want to have any of these to be very prevalent in your tank, otherwise, get ready to spend lots of time controlling their population.