returns aren't for everyone. I keep mine, too. Both the class rings I've returned, the people KNEW where they were lost, but didn't bother to go try to find them. "I stopped looking for that, but thanks" was the first one, and the second didn't give a rat's behind.
I know there are some fantastic stories out there, but I now hunt gold for the gold.
The only rings I try to return, now are wedding rings. Only ever gotten one back.
My take? If it was THAT important, they'd have gone back with a detector and found it. After talking with dozens of folks who have lost rings over the years, the majority of them claim it on their insurance, and typically get "bigger and better" replacements, as a result (most insurance companies will let you choose from a selection of rings with better stones, since they're so cheap). Of those that didn't, they didn't really care that it was gone... more of an "oh well, it's just a thing." The ones that DO care? Still post lost and found ads...
My thinking isn't for everyone... but treasure hunters ought not to be afraid to do with their finds what THEY want to do. Me? I follow the letter of the law, post an ad in the paper for 2 weeks, and 30 days after that, it's mine. If other hunters enjoy the thrill of the hunt finding the original owner, that's great too.
Cheers,
Skippy