You Just stop. I know this is the age of participation trophies but there are certainly things that separate fans from nonfans. "OH I'm just wearing a Falcons shirt, but I'm really a Saints fan! How dare you question my loyalty." Smh...
Just saying, "but I'm a Saints fan" doesn't give someone carte Blanche ability to troll the team. At some point, you're not a fan. Let me be more clear. If you're wearing a bag on your head, you're a Saints troll and not a fan.