Calvin Klein is resorting to innovative measures to keep nosy interlopers away from his chic and expansive Southampton mansion. Spies report the designer has put up warning signs outside his minimalist palace on Meadow Lane that read: “Caution, Poison Ivy and Ticks present: Do Not Enter.” We’re also told how Klein has installed security teams in crisp white shirts and black pants all over the grounds. Our spy also reports that there are numerous cameras around the property, and men stand at the ends of the circular driveway and patrol the area. The $75 million, glass and wood modern home has been under construction for three years, and this summer nosy locals have been poking around, and repeatedly driving past, curious to peek at it. One neighbor describes it as “a fortress.” A spokesman for Klein told us the designer “always has had security at his houses over the years. Yes, there are signs warning of ticks because the deer are rampant out here and people are warning of late of the grave danger Lyme disease presents to anyone exposed.”