As for losing quick release collars, I've had success with ID medallions - these are engraved with my postcode and house number on one side, and my phone number on the reverse and attached to the collar (ebay this, they are really cheap in quantity). I've had several lost collars placed neatly on my gatepost (OK, I have fabulous neighbours, I know some of you absolutely do not!) so this has been a worthwhile investment for me.
This type of identification has also helped with my latest rescue, Tufty, who is currently wearing a "Do Not Feed" quick release collar (due to his struvine restricted diet) in that his other Mummys feeders have come forward to be in on the rehab project (yes he IS very cute now I've done all the difficult, smelly and dangerous bit).
At least this way I can monitor who is tempted to "look after" my gorgeous boy, and it works out cheaper than constantly replacing lost collars.