Doing that on your own would probably get you in trouble. However, if Apple chose to do it themselves, then it would be a both a good PR move and of possible help to humanity. Same goes for Microsoft and the Microsoft store, and every store that has computers running on idle (Best Buy, Office Depot, etc). Who can we tweet at?
Whenever I'm in an Apple Store or department, I bookmark my website and leave it on the screen. Every little bit helps when you're at the end of the long tail....
The public display computers even in Apple-owned retail stores aren't on the corporate VPN so they won't show a 17.x.x.x IPv4 address (or an Apple-owned IPv6). They will show whatever local ISP the store is using.
Some Apple Stores in large cities are stocking the new Mac Pro. I don't know if they also carry a typical upgraded model, but that has sometimes been done in the past. The normal "stock" model is not very impressive and exists pretty much just as a baseline minimum price.
