The point of my stealth grow cabinet is to conceal my grow from apartment maintenance workers and any possible visiting family members.
Given my technological background, my stealth cab is masquerading as a "poor man's server box." It sits right next to my PC desk, which really helps to pass off the feeling.
-It's passed the stealth test quite a few times regarding various family members and several maintenance workers. Very "off the radar."
I've thought of alternatives... but having it in a closet is inconvenient and suspicious. I'm not allowed to modify anything in this apartment, so that's out the window. This was my next best option. It also doesn't generate any heat and uses less electricity than my computer does.
-I find it interesting that you mention police. Stealth grows limit most factors of drawing suspicion from police (less heat, less electricity, concealed). Assuming I ever received a knock on the door from digit 5-0, I'd just let them knock. Not like I'm required to answer it and if they have a search warrant (and those are relatively hard to get unless the grower is stupid) they're kicking down the door anyway.