Re: prohibiting visitors from connecting to network

["Tony Stahler" <TStahler () tempographics com>]

I would think you could use an allow list of MAC addresses.  It would
take a bit of work to gather them all initially, but after that point it
would just be a matter of adding new ones as the computers were
acquired.  

MAC addresses can be spoofed, but unless your customers are fairly
computer savvy I highly doubt they'd be able to pull it off.

-Tony