Because the very act of being on private land means relinquishing some rights to the property owner. I don't like the idea of suddenly being under the jurisdict

Because the very act of being on private land means relinquishing some rights to the property owner. I don't like the idea of suddenly being under the jurisdiction of private security just because I walked into an non-distinct private area. Especially since, as the article shows, plenty of them enforce regulations you may not know the details of.