I must be "middle aged school" then because I do some of both.

I have a few:
New School - Mugging someone because they just caught a schoolie.
Old School - Saying nice fish after someone lands a slob and continuing to cast to your spot because you know there's a bigger fish holding there.
New School - Someone with a bag full of shiny new plugs because they
heard they catch fish.
Old School - Someone with a bag full of beat up old plugs because they
know they catch fish.
New School - Fishing Storm Shads with the hook protectors still on them.
Old School - Not fishing Storm Shads because you know the hooks are garbage.