Blocking and trashing trails is a good each way bet for arseholes who aren’t the landowner. There are three very likely outcomes for them.
1. Riders give up and go elsewhere.
2. Someone gets badly hurt by a trap and the landowner decides it is just too much hassle and does the trashing ‘properly’.
3. There is so much rancour and complaint created that the outcome is as 2.
It boils my piss, TBH, but the desire to now ‘build’ everywhere is getting out of hand in some places. There is a difference between riding and riding in trails and taking a spade to the ground and starting earthworks.
Whipping off the odd errant branch cleanly and subtly is a lot different to felling a sapling. Riding a trail until a rut appears or a natural berm is ridden in is very different from creating a 20ft gap with associated massive f-off borrow pit. Etc.