fake alarm wiring?

Looking into these fake alarms, can I wire it into my aftermarket stereo? Hook up the LED red wire to the YELLOW wire on my stereo and hook up the LED black wire to the stereo Blue wire? Blue is a switched antenna/remote so it would only turn on when the truck is on. And yellow is the constant correct? I would like to keep everything in this general area but I dont want to try my radio! I decided on a fake alarm LED for my truck because I just dont want to spend a bunch or money on an alarm when I can use it for other items.

It won't work the way you suggested as far as I'm aware blue is open circuit, not ground when the radio is off. Red + on LED to constant 12v+, black - on LED to ignition, more reliable and doesn't affect the radio, also get a 12v+ flashing LED.

I have (2) cit lighters on my rig, one is on 100% of the time, the other is on only then the car is on, can I do red to power of the one that is always on and black to the switched outlet? I am not putting the LED anywhere close to my fuse box or steering column so it would be best so find something in the middle of my dash rather the ripping everything apart to find some wires...

yes.

Most simply wire their $1 flashing LED (with 560 Ohm or whatever resistor) with Anode to battey +12V (constant) and Kathode to the ignition circuit (whether IGN at the switch or ECU or fuse box etc).

I guess my plan needs to be re-thought out.. I have a lifted truck and unless you are 6'-0" or taller you cant really even see the location where I want to mount it.. Guess i need to figure something else out or it defeats me doing this.. I could drill it into the bottom of the rear view mirror but that may look weird, plus I would have to run the wire up the windshield which again may look weird...

Ar night the reflection is often seen. Otherwise you could mount several scattered LEDs all flashing independently. If they were controlled together, they could be synchronised or sequenced - the being real scary - but the it might be cheaper fitting a real alarm. Not that anyone would see the real alarm's LED anyhow, but at least they should become aware of the alarm.