People post .gifs of the game all the time in here. Does it escape you that I may have not watched the game, or you simply don't care?
Unless there are some further guidelines in place, it's always been spoiler free until after airing. The image in question is of a couple guys flipping one another off, which isn't exactly a giant revelation.
Halo 4 was the last FPS I can recall actually playing like crazy in SP mode.
The problem comes from posting a gif from a television show in a non-related thread. If anyone is spoiled after going into the True Detective thread, that's their fault, but getting spoled in an NHL thread is unavoidable if someone posts a gif.
We've seen other True Detective gifs in here, but this one was from the final episode.
About this gif, True Detective ending spoilers:
This one shows Marty and Rust in a hospital, which is a spoiler