Footpaths blocked by overgrowth or rotting styles do not annoy me particularly, that is usually a sign that the path is little used, the fact that there is a path there on the Definitive Map is the positive.
A large block of land without any rights of way is the sign of the arrogance of the occupiers of that part of the countryside, who cannot understand that others may want to appreciate it, it is the idea that such people can set themselves so far apart from the main body of the human race, this would annoy me if I thought they were worth it to even a small degree.
Privacy notices, without stating a reason are a sign of patronising arrogance. Signs to keep dogs under control, where there is no livestock or recent signs of livestock husbandry. Beware of a bull sign and a field is planted with potatoes. Just latent indicators of endemic hostility, caused by sloppy management.
Barbed wire across the top of locked gates, waymarks used for target practice, all indications of the ancient custom of hospitality, lost as certainly as carelessly tossed litter is a sign of a degenerating society.