Personally I'd never spend half an hour on a Sunday afternoon trimming back the gorse and hawthorn on a lovely flowing section of hidden singletrack.
Oh no, not me. Move along now, nothing to see here.
Nor here. That rumour about a team of three of us heading out in Dave's van with petrol strimmers, a pruning saw, trench spade and bill hook to sort out one particularly fave trail that had become inpenetrable. Completely false. 😀
Although I'd try your local Council Rights of Way Team first and get them to badger the landowner..