I also think Ghengis was correct in continuing his approach. Had he done anything else, without knowing the position or intentions of the other aircraft, the added confusion could have been fatal.
While from what has been described the PA28 pilot either needed a new radio fit, or a deaf aid, the only thing an airprox would achieve would probably not include an attitude change by the PA28 pilot.
However, the question I have is why do microlights have to land on runways, can't they land on short parallel pistes, rather like helicopters do at mixed bases.
As far as differences in circuit speed is concerned, I am quicker than C150's, and enter patterns ready to overshoot if necessary.
I have long since stopped worrying about the fuel cost of an overshoot.
Likewise I have come down the glide path at 150 kts when asked to expedite to avoid holding up a jet.
What Ghengis appears to have encountered is a pilot with an attitude prblem.