From a buddy inside comcast, he's acknolweged that, and he's pretty sure that if your on their Business class internet, your not subject to filtering.
I didn't even know that Comcast offered a Business Class Service until you mentioned it. $160/mo for their "enhanced" package - ouch!
"For that matter, arrests for "stealing" Wi-Fi are still rare and if someone taps into your network, in some places it may be hard to prosecute them, Bankston said. It's hard to prove an intruder was deliberately snooping rather than just taking advantage of signal that was intentionally made public. The flip side is that if you're the one looking for a signal and you happen to find your neighbor's wireless LAN, the odds seem fairly slim that you'll be punished for it." Moral of the story: Don't use your neighbors wifi to download kiddie pr0n
