Have you tried explaining those features to your customers and their benefits (ie, no worries about lawsuits should one of the workers injure themselves on the customers property)?
Ask them if they like gambling that way.
I've really gotten to see how many people value money over morals.I for one, could never hire someone knowing they're committing a crime.I've also had customers whom I've done work for ask that I write out an invoice as if the work was done on their rental property so that they could deduct it on their taxes.