Time Waster
Veteran
While of course the occasional cyclist who behaves similarly "sums up" cyclists similarly to some other people.
With one key difference, it's not illegal to ride cyclists on most roads in the UK but it is escooters. When someone rides an escooter of their own on a public road not a rental in a trial scheme but their own, which is illegal. Well imho the fact that they ride it in a very dangerous manner just emphasises their disregard for rules and indeed the law.
The whataboutery comparison with cyclists that ride bikes in a dangerous is trying to link a minority of cyclists with a majority of escooterists. Outside of the trial area all escooterists on public roads are illegal acts. Not all cyclists on public roads are carrying out illegal acts. It does no good to cyclists to link them in this way. We're an outgroup as it is without this linkage.
Now, perhaps in the future escooters will be made legal on roads, probably with rules attached. Then we will see if the dangerous riding of them is a minority or majority. Round my way, ignoring the current illegality of riding one on the roads (and pavements), it seems the majority are dangerous to me.