Lateness
Broken bike before the start of the ride
Moaning about the climbs (FFS it the South Downs, half the ride will be UP!)
Not bring a camelbak/bottle and sponging other peoples water.
People that issue unsolicited advice about saddle height, bar and lever position.
On a group ride, people that decide they want to change the plan because they don’t like the GUIDE’S route (bloody ride your own ride then)
Slow people starting first onto singletrack or DH and then not getting out the way and then holding the fast boys up (after being briefed to let the quick people go first).
Littering
People that ask for advice and then completely fail to take on board what they’ve been told because they didn’t listen.
Fast riders intimidating new riders on a social ride
SkidZ