Personally, I would be concerned. I am surprised your neighbors even noticed the sign on the doors. Most people see these type of signs and ignore them, because they are such common place, and expected in a home owners community.
I think I would look into a ignition/starter kill. People ignore alarms anymore, so all they do is annoy people.
What I used to do with my Cadi when I lived in the wrong part of town, found the fuse that controlled the ECM, put a in line fuse and wire, with a toggle switch on it. Hid it on my B-Pillar, and called it a day. 7 Attempted thefts later, I decided to sell the Cadi, but it was never stolen. Steering column was replaced/rebuilt many times thou.
No one ever expects to look for a kill switch on the B-Pillar. Its usually found under the dash. Open the door, flip the switch, sit down, start up, drive off.
A buddy of mine put his kill switch above the sun visor. It was a push button, so he would sit down, push on the visor, and start the car. Was a neat little idea, but I didn't want to pull down the headliner, and a/b/c pillars.
And thank your neighbor for being vigilant and remembering the name and contact info. Home constuction or home floral service? I wouldn't freakout my neighbor like that without having something to follow up on lol.
