"So? Anyone can spider content."

Apparently not anyone, hence the questions here and elsewhere on this subject.

"Swearing on a cellphone in the USA is illegal."

In New York state a fine of $25 can be levied for flirting. Are we descending in to a contest to list the least sensible/enforceable law?

"If Facebook actually wanted to prevent spidering they would limit the number of pages per hour per user id and toss in captchas if a user goes over the limit."

I'm not a Facebook user, but I know many people who are. Your solution makes no sense from a usability point of view, or from Facebook's perspective/business objectives. They provide an API for what they consider legitimate interactions with their systems. Again, this is on their terms, if you don't agree with them, don't use their service.

While it technically possible to violate terms and conditions, SPAM peoples guestbooks and far more nefarious activities, personally I don't think this is a suitable place to provide such solutions. Just because things can be done doesn't always mean it's a good idea.