Because I, my dear, am the consumer.
If I decide to buy a new TV then I do some research... warranty, reliability etc and comparison shop between stores. But I can't for the life of me remember a time when Future Shop and Best Buy have shared notes on whether my credit card is good or if I am a pleasant customer.
I understand the need for security as you are in a business where being naked and vulnerable is par for the course but requesting that EVERY man you see has retina scans and lie detector tests before you agree to spread your legs for them is rather laughable.
You have a 'bad date' then post it in the Neighborhood Watch, you have a stalker then post it in the Neighborhood Watch but getting all skittish about every one that walks through your door is an immediate red flag for me and I'm certain I'm not alone.
Run your business the way you desire dear, but do remember that being overtly paranoid and asking your punters to jump through hoops may negatively impact said business.
From where I'm standing you're one step away from being another crazy cat lady and going postal on someone for no reason... throwing accusations around and accusing them of all sorts of shocking behavior.
Good luck out there