When buses had a fall complement of seats these issues did not arise, however sine tfl ripped out seats to get more people to travel on the buses and the introduction of facilities for those who are disabled, has resulted in it becoming a free for all. I thought parents could bring push chairs, buggies, prams or what ever you want to call these contraptions onto the bus as long as they were prepared to fold then up if no space was available. What is annoying is when you happen to be standing in the wheel chair area as the bus is rammed solid with passengers and someone with a push chair gets on and decides they don’t want to fold the pushchair and decide to ram it into anyone in the way, resulting with a killer stare if you don’t get out of the way.
Buses carry adverts about passengers showing consideration to each other. It works both ways.