When you say Permanant blinds do you mean with man made materials (lumber, plywood, netting etc)? I can't say where I hunt those are an issure, just don't see many of them, but if I did I wouldn't like it very much. Now there are a couple of ladder stands that are left up year round and I don't like that very much. Myself I prefer ground blinds but mine are all natural, I usually pile up some brush infront of me under a pine tree with low hanging branches. I just prefer not to be looking at a pile of lumber. But I dont' tear it down after the season, I doubt anyone else has even noticed them.