Anybody who has ever had a car stolen already knows how (un-)seriously police take that crime, so it's unlikely they'll start taking seriously the theft of bicy

Anybody who has ever had a car stolen already knows how (un-)seriously police take that crime, so it's unlikely they'll start taking seriously the theft of bicycles that cost something like 1/40th to 1/80th of what typical cars cost. Police are never going to get into the business of tracking down your private property. It's not a good use of their time. The good news is that you can largely mitigate the risk of almost all kinds of bike theft with some pretty basic preventative measures.