I really don't see how it is a disaster for the ecosystem. Not nearly enough people keep them. More common aquarium fish are collect at much higher levels from the wild than octos over will be.
now that there is an easy stay at home place to buy them, the numbers will go up just like the fad of piranhas. every one had to have them ,
besides these creature are truely intelligent, and shouldn't be in the hands of uncaring, and unknowing people, somewhat like pacu are,.. there are people that want to care for them, anything we as humans keep have the potential of not being cared for correctly, even horses, and dogs,..i just think some of these creatures should be more difficult to get as to protect them from every tom, ****, and harriet... but i feel that way about most animals, and inverts, and reptiles, and fish...
just my own opinion.......