“There are two basic problems squatters have in gaining tenants’ rights:They are not paying any rent.They are living there without the landlord’s permission.But as impossible as it seems to get past these hurdles, it is do-able.”So explains Homes Not Jails, a squatting advocacy group, before offering a how-to guide to illegally occupy someone else’s property in San Francisco. The tone is brazen. The group notes that some people squat for “political reasons” because they believe that “paying money for housing (and others making money off housing) is immoral” and brags about how the