hi yuri! yeah, i read that some of them would have a photo (kid/kids) in them and am thinking that might bring a more positive response than if not...the other factor i wondered about is how many of those who found them have lost or had their wallets stolen at one time or another...it's such a bad state to experience and one who has would get a very good feeling (speculating on the HUGE relief the recipient would feel upon it's return) by doing the right thing
i periodically check out the Acts of Kindness section...i click on various months archived and it makes one feel better about the world...i really need to write one based on an experience i had this past year...when you're on the receiving end (for a change, i like to think) it's very humbling
http://www.thestar.com/kindness
aside:
most of the time i lose my wallet or keys it's just my own absentmindedness