Not everyone has them and even if they did you can hide it wherever you want. Install cutoff switches, be smart about where you park and if you live in a neighborhood where you worry about your car getting stolen I'm not sure there is a way to stop thieves 100%. Honestly if someone wants your car that bad its going to take a lot to stop them.
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.