Rogerborg

Local site: "You MUST wear boots that provide ankle protection. If you show up in trainers or unsuitable footwear, you will not be permitted to play."

Me: "Ruh-roh!" [Types a treatise on why their active voice has created liability for themselves where none existed, and wondering what they'll say when some ambulance chaser asks "So, what exactly qualified you to determine that my crippled client's footware was 'suitable' when it demonstrably was not?"

Also me: [Takes a deep breath, deletes]

They'll find out the hard way, or they won't.  But I doubt they'll believe that trying to do the right thing can create a rod for your own back, until it's whipping them.