Other than in cricket, where the English team is representative of the England and Wales cricket board (not bothered that the Wales bit is often omitted), I've not supported England in any event since I was 13 (1991). As a kid I did regularly. My 5 year old son supported England in this world cup and was devastated when they lost last night. When I worked in a primary school, most kids supported England.

I think there is an age where some realise or are told that it's not ok to support England any more. Rightly too.