I think this is an idea worth exploring, a serious and truly engaged / potential buyer should have no objection to producing identification to attend an open house. We need to look out for our sellers' best interests and this is yet another way to do that.
I haven't hear of that here in Metro Detroit area but it's a great idea for security.
Yes it should be posted and not allowed to be used for leads (only if lookers agree).
I have my sellers ask agents for their license/pocket card and verify it with their business card as with the appointment email they received. Or the neighbors if the house is vacant.
NOT to be funny but there was a episode in season 4 (I think) of Breaking Bad where the sister-n-law was stealing from open house. The Realtor tackled her and called the police. Her purse was full of stolen items from several open houses.
A sad situation.
Probably not a good strategy to do an "Open House" and make it difficult to see. Agent showings are generally with pre-screened and pre-approved buyers. If the seller has security concerns, they should hide their valuables. I commonly go over this with all my clients, never have anything out someone could put in their pockets and walk out with. You may not notice for a few days if its not something you use regularly and then it's gone.
I've heard of it but never seen it done myself.
Right or wrong, I'm sure this is being done with the best intentions. People take whatever measures that are necessary to protect themselves and their customers. What's wrong with asking a total stranger seeking passage into someone's home to verify who they say they are?
"An ounce of prevention......"