I'd never recommend it either,but I am one of those people. It all depends on the setup. I'd never do it on an SPS reef or heavily stocked reef. Softies and LPS seem to like "dirtier" water. The only time I religiously do WC is in QT due to lack of natural filtration. All my tanks are heavy skimmed and heavy natural filtration. I did have one reef where there was nothing but liverock for filtration,the corals thrived for 2 years until I broke it down, there was no fish in it tho. Again I don't recommend not doing WCs,this is just my experience.