I get on the London tube every day to get too and from work always during rush hour. There will often be little kids on the tube too. Am i being unreasonable to think that small kids (i'm talking small enough to be carried) shouldn't have a whole seat to themselves, when they could sit on a parents lap? The other day a lady plonked her 1/2 year old on the seat and then the baby decided to crawl on to her lap and she said "aw you can never tell if they'll want their own seat or not" and kept her on her lap so she could then breastfeed, but kept the baby's belongings on the seat so people couldn't sit down meanwhile there are people standing who could be using that seat.
I think what is most annoying is that the kids sit down, climb up on the seat, get down from the seat so clearly aren't interested in sitting down so it's not like they're tired/want to rest. I am not saying kids should have to stand on the tube, as I get that they're too tiny in the crowded carriages and they'll get tired easily, but is it unreasonable to think, if they can, that the parents should let them sit on their lap so someone else who might need it can take the seat instead?