One thing I find kind of hilarious, everyone assumes trying to catch a fleeing opponent isn't fun.
I love me a good game of cat and mouse. Get over here Jerry. It's not for everyone. but to put a blanket "That's not fun" statement over everything is not exactly fairly representing things. This is a maneuvering game first and foremost, the shooting is to see who maneuvered the best.
Criticizing player tactics over a subjective concept like fun is pretty much impossible to justify. For every time you say 'that doesn't make the game fun" you can find someone who disagrees. This kind of argument probably occurs on every game forum for every game ever.
"Doing X makes the game not fun so no one should do it"
"actually I think it's pretty fun and can be countered with Y tactic"