Smellvin
I'm not sure it's a sport, but lots of people do it because:

A. it gets you away from the wife for a while and
B. it allows you access to free fish.

Old_Zircon
Being outside in the winter is generally great no matter what you're doing.

Ursa_minor
If I had more stars....

Urist
"Trout are fresh water fish... and have underwater weapons!"

Corman's Inferno
Which is why I propose we introduce some Daleks into the native ecosystem. That'll solve everything!