Maybe they should do special carriages for people with buggies, prams, the elderly ECT. Then again, you could just do the decent thing and move carriages if there is room.
There was special carraiges for Buggies its called a MK1 BG, but since most TOCs have done away loco hauled trains, no where to put buggies is one of the downsides of units.
Also the attitudes of some mums get on my nerves, as far as there concerned "I'm a mum and I'm heavily laden down with bags of shopping and buggies full of screaming cretins, so I automatically take priority over you lot.
I'm not saying all mums are like that though, some just deal with it.