I am not going to contribute to the above bickering... just give you a few examples as to what has happened in my tanks in the past...
My very first tank had a pair of false perculas. They hosted a heater, then powerhead, heater, intake to filter, skimmer pump, torch, hammer, frogspawn, candycanes, and finally hairy mushrooms in that order. Obviously, lol, the equipment did not mind at all

They nearly killed the torch, then when they moved into the hammer that was VERY large, it nearly killed them. Nothing else was ever really bothered by them although, I am NOT saying it wouldn't be as they were only in that tank for six months.
My next pair, which are my B&W's pictured in this forum, have nearly killed any and all coral they came into contact with. I had a full blown acropora reef and even though my lone RBTA was in the tank, the male (when pushed out of the nem) would host everything else. At feeding times, the female would brutally rub everything near her. She broke several prize acro's that were getting to be over 8 inches wide. I even had a heck of a time fragging those things, lol!
Now that they are maturing and showing spawning behaviours, they are even beating up the nem which is easily ten times the females size.
I have had success over a year with certain clowns and definite failers with other's housed with corals. Since my clowns have matured quite a bit, they are now housed in one of my breeding setups with no coral, only the RBTA.
If it has worked for you, that is AWESOME!
As everyone else said, keep a close eye on whatever they host no matter if it is an anemone, LPS, SPS, or softie. No matter what species of clown, they all get very rough especially with age and spawning.