Is it time to start calling out bad cyclists?

the not a head masters ritual:

mr angry jones from brixton
rides his bike and never gets beat on
one day from behind a tailgater he spies
so drags him to the ground and beats him

No, no, no, you've made a limerick but the rhythm's all wrong. You want:

There once lived a chap, Jones, in Brixton,
Whose bike was, perhaps, a fixed one.
One day from the rear,
A tailgater appeared
So our hero got off and sore beat him