Liability is a major reason but it's also a security concern. Is someone up to no good? Casing a location to plan a robbery/kidnapping/theft/vandalism/squattin

Liability is a major reason but it's also a security concern. Is someone up to no good? Casing a location to plan a robbery/kidnapping/theft/vandalism/squatting/arson (or any of these in progress but not yet committed or committed but not provably by the tresspasser)? It's difficult to impossible to know because you can't just determine intent. But if their mere pretense in a location is prohibited that is easy to determine and prosecute. It's very important for security sake to be able to create bright lines that bad actors need to cross and which good parties are unlikely to cross accidentally so that response can have a high accuracy. People passing through may also litter, set fires, scare off wild life or travel to a space where they are allowed to hunt (and then kill wildlife that crosses properties lines, or inadvertently shoot bullets or arrows into space you're using). The need to immediately paint one party or the other as in the wrong in a dispute can make it hard to see that in many cases all parties have worthwhile concerns and that there aren't easy answers.