Whatever happened to being neighborly?

Wildwood - Whatever happened to being neighborly? A condo association nearby sent me and several other neighbors a profane, threatening letter warning us not to walk on “their sidewalk” or anywhere near their building, and that he has set up video cameras watching us and our houses! I shouldn’t have to feel this uncomfortable in my own neighborhood, nor should my family, friends, guests, and fellow neighbors. What happened to the commandment “love your neighbors as yourself?”