Whereas with under a few days you could just call the police and arrest them for trespassing.  

If you want to videotape someone, then you do have to have internet.The most important thing is not to capture intruders on camera, because let's face it, you're never going to be able to identify them to have the police arrest them.

Looked them up in the court records and found multiple arrests/court cases for possession with intent to distribute/sell of narcotics, and multiple charges for 1st, 2nd, degree assault and assault with a deadly weapon. 

I called the police and they pulled in swat style and arrested 4 teenagers.

I was interested in a vacant foreclosure (the owner is deceased) but found out his son has major drug history, including selling heroin, and was arrested at the house last year, well after his father's death.

They got drunk made a lot of noice and got arrested.

For comparison if Tesla's Musk were to get arrested for something serious, the stock would plummet instantly. 

The tenant was arrested for aggravated assault and then quickly out on bail due to no priors. 

He died 3 days after the police-raid on his subsequent rental house in which his roommates were arrested and his subsequent landlord cleaned out the house in short order afterwards to re-rent it.

If you touch them and they call the police, you could end up arrested for trespassing and assault.