Gotta disagree with the bad azz act, if you look like an azz it could be an invitation for problems, especially when they have their car full of their bandana buddies with those things that make loud noises. But it sounded cool. Besides, real bad azzes don't act the part, be aware of the surroundings without bringing attention to yourself. Keeping a low profile, being low key and appearing unconcerned is much better at avoiding trouble, IMO.
How long can the Doberman stay in your vehicle?
A pro thief doesn't want attention, noise or a difficult target, they want in, and be gone. If they see a "club" on the wheel they will go to the next vehicle. If they see an alarm sticker they might keep looking.
Some good stuff by Buliwyf in the woods or in stealth mode, can't even light up a smoke! OTH, in the lighted parking at the hospital you may not need to hide. Again, keep a low profile and don't attract attention, I have no idea how the guys in the MOGs do that. Guess they are high enough you can't look in. Dark limo tent is great, so are curtains. I use to do investigations, my "spy on them van" was blacked out with a curtain behind the drivers seat. I was sitting in Swope Park in KC at night (not a good place to be) the van was dark blue. I was sitting inside with my camera running and a couple guys came up to the window right in front of me and cupped their hands (have no idea why, like to shade their eyes at night) and looked in. They didn't see me two feet away, or the 9mm on my desk or the 12 gauge in my hand! They just walked away thinking it belonged to someone they knew. LOL
I've done a lot of stealth parking in cities and in the woods. Different tactics, but the main thing is not to be noticed in the first place.
Used magnetic signs, not so much for security but as an excuse to be somewhere. Sunset Realty. Sunset Home Inspections. Dale's Plumbing. Lone Pine Cemetery. Sometimes being in an area where you don't belong brings attention from those you don't want to meet regardless of the color of your vehicle. Used them on my gold F-150 with running boards and a cap cover too, never a problem. It's called pretexting, appearing to be someone you are not. Lowe's isn't going to complain if there is a Dale's Plumbing truck in the lot overnight. If there is an obvious reason for you to be somewhere, there are fewer questions and most won't give it a second thought.