A guy on Reddit that might post here compiled a list of user comments and their use of the F word. Turns out Denver gave a F the most and Jaguar fans give the least.
Seahawk fans had top 5 comment numbers but only middle of the pack with use of the F word. Only 60.89 per 1000 posts.
https://www.reddit.com/r/nfl/comments/h ... ucks_last/