I ALWAYS wear a seatbelt - always did.
I ALWAYS wore a SNELL rated MC helmet when riding - always.
I have been robbed, vandalized and broken into (my businesses) multiple times. Had state of the art video systems with hi-res color cameras all over. The Police NEVER caught one single criminal in any of the instances due to the cameras. Therefore I am reporting the real deal as it happened to me. I understand where you are coming from and still have video systems in place on my new home. Maybe they will capture and maybe they won't. Maybe they might deter a "smart criminal" maybe not. Maybe I will get the early warning and there might be a delay. One thing is for sure...... I will not count on and bet my life on a video surveillance system - not after so many disappointments!
Yes - I feel better about having one than not, but the theory has still not proven they are all that useful to me due to real life experience. Once again, if a woman is raped and it does get captured in video, guess what - she STILL got raped and you can't undo that - video or not! So a deterrent? A big maybe.