I guess Kevin what holds true for deer acting different in different areas holds true for hunting customs as well. Here a reciprocal agreement to retrieve wounded deer is fairly common but is still a privilege. Hunting from property lines increases the need to use the privilege; Use it too much and those agreements can and do quickly fall apart. And then there is a serious safety issue whether everyone is careful or not. But both of those things aside lets look another problem with hunting property lines. Lets assume that if you hunt the property line and that people from the other club are doing the same. So say the stars line up and you and your Dad finally get an afternoon to go out hunting together and you are sitting watching the path on your side of the ditch while another pair of hunters is watching the deer path on their side of the ditch. Neither of you know the other is there of course. You see nothing for three hours and then finally one hour before dark and even with the stink of four humans in that immediate area, you see a spike cross the ditch, you get ready but he turns and goes back into the ditch. A shot is fired from the other club and a deer comes out of the ditch on your side, you shoot it and down it falls. You run to it and get there just as the other hunter walks thru the ditch to retrieve "his" deer. The good news is that no people got shot but of course the hunt is "successful" for one pair of club members from one club and is cut short for the pair of club members from the neighboring club. The shooting and people movement and interaction in that area has ended the deer movement and thus the hunt at least for the day there. Safety and manners issues aside that still does not sound like a great day afield to me for either pair of hunters.
Maybe in your location that is normal due to too many people/shortage of land issues or something but I would certainly be looking for other stand options at least 50 yards from the property line. Keep mind also that while ditches sometimes get heavy use, the deer sign in them often looks a lot better than it is. Deer traveling through low spots make trails quickly as compared to deer traveling on a side hill through a pine grove for example but there could be more deer traveling thru the pines on the side hill. In either case the land off the property line has a better chance to give you a better and safer hunt than the property line hunt. Best of luck to you in your hunting.