ORIGINAL: magicman54494

What it all boils down to is respect. Respect for other people and their property. As a property owner I know both sides of all these ethics threads. I don't care if it's an antler or a wad of $100 bills. ASK before you take anything that is on someone elses property.
A bear hunter stood at my gate (he could see me) and released a dog across my land. Had he asked, I would have gave him my blessing. He didn't, he is not welcome any more.
If the owner isn't available, take the antler then inform him and offer it to him. If he doesn't want it he will think the world of you for offering. If he wants it, ask to take some pics of it. People will respect you for respecting them. That antler that you took could be the matching antler that he has been searching weeks for.
Better yet, go meet your neighbor. Ask him about things like shed hunting. Then this is no longer an issue.

I hunted for years on a friend's property. I knew I could hunt every year but I always asked every year.