I won't be arguing with anyone.
Thats maybe how you behave at football,not me,each to their own though.
Ill politely ask them to sit down,I dunno what your experiences are like,but not everyone that goes is a drunken arsehole.
That however,maybe says a lot more about the people you surround yourself with and how you behave more than anything.
I generallly find if someone sees that they are blocking a child's view,they tend to be a bit more understanding.
Maybe ive just gotten lucky at all his home and away games though.