Happens all the time with the trail building in Dalby.
You'll never ever get a complete closure as some total knob will always ride down the closed route – as has been said before, they think it's their God given right even though they've had sweet **** all to do with the building.
You even get it on under construction sections which obviously are nowhere near being finished and don't actually go anywhere.
I used to take great pleasure, when we were building Crosscliffe section in Dalby, when asked where the trail went, answering with "back the way you've come, didn't you see the **** signs!?!" I doubt they'd learn from it though…