MENTALISTS which I happen to be, sell entertaining attractions that deal with the surreal. They are marketed as an entertainment/curio without any direct claim of being "legit" though they will exploit local legend and lore so as to allude to the possibility of being such -- it's 100% psychological and has been a part of show biz for well over 150 years now.
Yes, we will present what we do as real, this is what makes Mentalism so powerful -- it's not played at as being "a trick" but actually depends on the act of invoking belief and commitment from the audience, whether I'm doing my Blindfold act or presenting a Seance. It is a standard to the craft to neither make claims nor deny the paranormal possibility even though many a wannabe magic buff and self-described skeptic that's read on Houdini believes all entertainers need to use a disclaimer. . . that's their insecurity, not mine. Most that use the disclaimer are a joke in that they are some of the poorest showmen and frequently terrible slight-of-hand artists around. . . and that's before we get into the Jamie Swiss types that condemn parlor Readers for bilking the public but feel it perfectly fine to use Barnum statements as a means to seduce young ladies. . . I can assure you, he don't use a disclaimer for that, he wants the illusion of power so he can dominate them. Which is the more more "moral" and "ethical" when it comes to such things? Be careful, Swiss isn't the only magician that plays this hypocritical game. . .
The other thing when it comes to Ghost Walks as well as Seance shows, is that 90% of what people experience is pure psychology, we just prime the pump. It's amazing what people experience in a quiet, dark space when they are left alone for a few minutes.
Orbs. . . as we know, many such things are due to natural phenomena but not all. Most professional ghost hunters know about the classic explanation and deliberately warn their guests of it, telling them to not assume that every dust particle in their photos is an Orb. In fact, the legit ghost hunters out there go to extremes when it comes to discounting certain phenomena, but these guys see themselves as serious researchers, not entertainers. Very few of them ever do "charters" and tours.
BTW. . . I've installed ghosts into several bars and private homes; actual systems that make people feel they are in a haunted house as well as mechanical bits like glasses that slide on their own along a bar and the classic moving eyes behind the portrait. I've even put a Lady in White in a few places; you see her at a distance as she moves from point A to B; translucent but solid at the same time. But what makes her enchanting and impossible is that she's not seen every night, just on certain nights at certain times; it's the local lore around her that brings people to the establishment with the hope of catching one of those rare glimpses. At least one such display that I'm away of, was built into a facility that's known a 200 year history tied to just such a visitor or two, so why not exploit it if you are a business owner needing to bring folks in?
Skeptics just take things far too seriously, they need to learn how to relax and let their inner-child out so they can enjoy the magic in life.