Question, why would someone create a thread about tennis on a blog for Celtics talk? It seems like a very nerdy topic. I imagine someone coming on Celticsblog for the first time and not coming back because one of the threads was about tennis mainly due to the lameness of breaking down tennis players.
It takes about 10 seconds to look at your posts page and see you have contributed to a thread about the best show on TV. That could really put some people off, coming here to talk about The Celtics and seeing one of the threads is about some mindless entertainment. Read a book!
And, really, you posit that tennis is lame as if it were some universal truth. Many people like tennis, myself included, and perhaps even the hypothetical visitor you imagine. They could even like tennis.
(and the thread was in an area called general sports....hmm)