Yeah, speaking of QR (quick release). Really evaluate if you really need QR. This applies mostly to MTB and roadies.

QR was designed for RACING situations (by Campagnolo). Most riders don't take their wheels off or adjust their seat for months at a time! Yet they leave their wheels and seat vulnerable to theives at the flick of a lever. Trade those QR for bolts or locking skewers.

BTW, I've known of kids stealing QR seatposts and seats on a dare. Then they just throw them on a roof or something. Again, a crime of opportunity.