"One man's weed is another man's rose."
We have a 55g reef set up with zoas, sps, lps, leathers, anemones, gorgs, clams and of course kenyas. Yeah the kenya has spread & I only let it in the fowler, besides the 55, not my big reef...but it has never been so bad as to be a nuisance. It has been in there for three years plus, and again has not been that big of a deal. It has never had a warfare issue.
She likes it, I dont mind it, so it stays.