So ultimately it's just your opinion on the matter.
In all seriousness, there has been what,
one death caused by a cyclist on a pavement this decade? Is that right? Even when dicking around cyclists do not pose that much of a safety risk - it's much more of a perceived risk.
Pushing someone off their bike, because they're on the pavement (and not taking other circumstances into account!) is an actual safety risk.
If a cyclist, or anyone came straight at me and was going to hit me I would obviously push them away, but I wouldn't do it just because they were cycling poorly on the pavement. Maybe call them a name or two.