Not a race nor official trail work. A person on a local hiking forum has taken it upon themselves to raise awareness of unmaintained trails and flags the piss out of them, writes a trip report then moves on to the next trail. I've got no problem with a bit of flagging for crucial route finding but no one goes into the woods to look at pink flags every 10-20 yards for the duration of their hike. Especially when the original trail bed is still clearly visible.