Big brother is watching your open house. Homeowners associations across the country are quietly signing up for Flock Safety’s license plate cameras, and the backlash is now strong enough to blow up home sales, kill signed contracts and land cities in court, with New York at the center of the fight. Nowhere is the backlash more raw than in the Adirondacks, where the fight has already toppled a signed contract and sparked open revolt inside a gated community. In Saranac Lake, a resident living behind a gate who protested the cameras in his own neighborhood said the issue isn’t security...