You couldn’t. I can drive down the street of almost any neighborhood in America and find (inadvertently) open networks on every block. This bill is just going to sweep up a lot of innocent people into Big Brother’s maw.
If I were a legit business offering my customers open wifi, I’d shut it down before hiring people to examine every downloaded image. The only alternative would be to charge your customers, make them open accounts, and store their every mouse click in perpetuity.
That makes no difference. If you are a registered Democrat there is no need for any concern whatsover; Her Highness will not go after you.
OTOH, if you have ANY conservative connections or if you've EVER posted on FR, you'll be prosecuted to the FULLEST extent of the LAW!
Depends on your setup.
Most home wireless AP’s can be configured to only use a certain range of IP addresses or to only respond to certain MAC addresses. Start off by using WEP encryption, and if you still detect somebody stealing bandwidth, tighten the screws down.
If most of this sounds Greek to you, hire a professional or talk to your ISP.
You’re in the clear. You’re not “offering” it to “the public”.