I read that you should keep it 2 inches away from all other corals. To be safe, I went 4. I haven't experienced the range of yours but nothing can be within 7 or 8 inches of mine. I learned that the hard way.
Does clipping the sweepers hurt the coral in any way. I merely 're-coralscaped' to avoid the problem. If I can clip WITHOUT HARM, I will do so. I don't want to punish an animal for doing what it normally does (however, I do grab both of my labs if their sniffers start to go for a guests crotch---I have my limits).
I target feed all of my corals fairly regularly. I'm not conviced that hungriness has an impact. Maybe it does, maybe it doesn't.
BTW (Anecdotal evidence alert!!!), when I added my 3rd maxijet recently, the damage seemed to get worse. MAYBE flow does have an impact.