Valid points. It's usually pretty easy to tell though. But you know, I think the world would be a better place with no inked discs. Makes them so ugly.
And ink makes them so much harder to get away with keeping it, right? (I kid, I kid)
Thing is it absolutely isn't "easy" to tell lost versus abandoned, for the simple fact that you don't know the circumstances involved in how that disc came to be out of its owners possession.
If a disc is lost late in the day, and the owner runs out of daylight in his search for the disc and leaves the course without it, is it lost or abandoned?
If a disc is lost during a tournament round in which, by rule, the player and his group has just 3 minutes to locate it or they must move on, is it lost or abandoned?
If a disc is lost and the player is in a rush because he's got to get off the course to pick up his kid at school, is it lost or abandoned?
What if in the meantime, while he's picking up his kid, someone else comes along, finds his disc, and throws it into the pond 5 holes away from where it was originally lost so any attempt to return to the course and search is fruitless? Is the disc resting in the pond lost or abandoned?
In an earlier post, you said "I just don't understand if someone deems the effort to find a disc is more than the value of the disc how they think they retain ownership." My counter to that is how do you know, just by finding the disc, how much effort went into finding the disc and what the circumstances were when that effort was made? You're basing your viewpoint on an assumption. An assumption that is more likely to be incorrect than correct most of the time.
I commend you for doing the right thing with inked discs. The problem really lies with the people who make your argument about "abandoned" discs as a rationalization for keeping or attempting to profit from any disc they find, inked or not. Without being able to prove intent, it's extremely difficult to make a convincing argument that one "abandoned" a disc versus simply losing it.