maybe because hes moaning about people endangering his "family". However its him who chose to take his young (4 year old?) to a trail centre mountain biking. Which is his choice, however by his own admission it was very busy, he chose to do the red route, and chose to take his son mountain biking, in itself pretty dangerous sport if things go wrong (which they sometimes do).
So hes assessed the risk of doing this with his son, and then decided that taking a 4 year old on a tag along, on a busy weekend, at Glentress, is totally acceptable.
Then when the inevitable happens, (ie someone gets alittle close, but no harm done) he says hed (rip off thier head" etc etc for harming his beloved family. Yet after all hes the one who put his son in that situation, accepting the risk that accidents at busy trail centres on red routes sometimes happen.
So moaning and being all aggressive on a forum about how everyone should watch out for him is abit short sighted, and possibly some of the blame might just lay with the original poster.