Sometimes we look at situations only in how they affect us personaly. If it is invasive and a threat to indigenous foliage, it may well be for the better of ALL the people and the local eco-system.
Unfortuneately it looks as if an irresponsible few have spoilt it for the benefit of many. If only people would keep their tanks to themselfs and stop pouring them in the sea when they get bored in an effort to ease their concience and free their hands in a hurry.