My biggest security issue with this era of civic/crx is simply the window to door molding. If you look at the window seal it doesn't track into the framing of the door. (That arc at the top where the window slides into) The seal isn't integral so the window is only closed into a rubber track. If you pry the rubber back then you can form a 2-4" gap at the top of the window which is plenty of room to reach into the cabin and flip the lock switch open.
Knowing this has saved me from multiple locksmith calls but also anyone with a brain can break into your car realitvely easily and without much fuss, just need 2 flat heads and it can be done in under a minute easily and with nearly no damage. So I don't keep anything important in my car. I take out my stereo faceplate. Until 2 years ago I was using one way screws like on security doors to mount my stereo into the center dash area. But after getting the stereo stolen anyway and seeing the resultant damage I use no screws only clips. Cost almost 200.00 to fix the damage from the theft for a 100.00 deck. My amp and speakers are bracketed with rivets and those special hex screws with the pin in the center so you need a hollow bit to take them out, a pair of pliers does the job but is time consuming.
Essentially My car isn't theft proof its resisistant as far as the high $$ items go and simple and easy to pevent damage for the cheap stuff.

As far as full on theft I have a switch spliced into my fuel pump hot wire coming from the ignition (the yellow wire) and a second switch into the clutch interlock forcing an open even with the pedal depressed unless its on. If someone knows what they are doing and wants the car well ain't nothing I can afford will stop them, I try to slow the process as muchas possible.

Yes I ramble hope this helps.