In my area of Indiana it is directly related to how most "hunters" treat the ground and landowners. It never ceases to amaze me how folks take for granted and take advantage of access to ground...never investing a dollar or a minute of work, then get bent out of shape with a landowner asking them to close a gate or something, or trashing the woods. When I started hunting the main property I'm on near home it was open for the asking, and there were probably a dozen different trucks I'd see over the season..and of course nobody seems to hunt alone - never "me" always "us" hunting, so Lord knows how many people that was.
Now, 18 years later, I'm the only one with permission to hunt this ground. Over the years the landowner and family got sick of what people were doing and kicked them off one after the other. From shooting one of the landowners dogs (yep, true story...and a "bowhunter" no less that the landowner used to let set up a camper in one of the fields), to leaving pee bottles laying on the ground under trees to showing up with groups of people the landowner never met - one of which tried to kick the landowner's 50 year old son off the property, "hunters" can really be jackasses.
The difference - I actually became friends with the landowners over the years, and not to use them for hunting rights, but because they are good folks and a friendship developed. I actually CARE about them, not just show up a week before season to get permission (WOW, NOVEL CONCEPT!).
The only things I went out of my way to do over the years was to comply with all their wishes about where to park etc, posted the land at their request out of my own pocket, and made it VERY clear that what the typical "hunter" was doing to their land and trust made me sicker than it made the landowner.
That said, I know it will eventually change as older members of the family pass away etc. so I bought my own place to hunt. And sorry, but I too post my land and lock the gates to keep off the modern day "hunters".
Times have changed, and so have "hunters" - I frankly cannot blame landowners in general from locking the gates.
Sad, but true.
R