There isn't anything punishable evidenced in that screenshot. Club descriptions are indeed subject to the same Terms of Use as other in game content. We used to silence for players instructing others to farm a specific player. However, several months ago the rules were changed due to the fact that this is viewed as part of the game. I suggest you contact a club admin and point out that their club description is diminishing your enjoyment of the game. Perhaps suggest a happy compromise and we can all links hands and dance into the sunset.