It's pretty simple really..
The same reason you like to discuss the Rockies with Rockies fans, is the same reasons some Giants fans enjoy discussing the Rockies, or the Giants, with other team's fans..
There are always going to be fans that post on different message boards. We have regulars from the braves, phillies and even a dodger fan or two that posts on our boards as well as others..
Nothing wrong with it, it's just fun banther between teams and fans..
You can't control it, so you can either ignore it, or not. But getting mad, attacking others, then calling THEM losers is just sad.
BTW, \I lived in the Estes-Allens park area for 7 years in 90's and travel back 2-3 times a summer to see games there. LOVE the atmosphere at Coors, been to well over 100 games there and have had numerous great conversations with knowledgeable rocks fans at the games and have a ton of respect for Tulo and Cargo and the very underrated fan base you guys have.