As a human being,

"stealth" means that it's not trivial for other people to block you from crawling their shit and

"damage, impair or burden" is in the eye of the beholder, the above person trying to block you from crawling their shit

Yes there will be patent-trolls attempting to squeeze this. Which is why it would be in the crawling entities' best interest to provide electronic means to opt-out and abide by them.