When you go into a bookstore, do you routinely get clerks saying "Thanks for coming to our humble establishment. Prior to being allowed to actually see the books, we'll need you to sign this waiver of liability, which disclaims any responsibility on our part if you should open one of the cookbooks and cook Thai food while having a lethal allergy to peanuts."
This has not been my experience in bookstores. If you're totally unable to sleep at night because you live in fear that vampires might descend on you if you do not say the right words and make three circles clockwise prior to opening for business, then say the right words and make three circles clockwise. Otherwise, go solve a problem for people.