they come into a basketball thread just to declare how much they don't care.
Absolutely. This is why we need an SECR basketball board (and a TD one, I guess)
No...there is no need for a separate basketball board.
There IS a need for people to just stay out of a thread if the topic isn't of interest to them.
I liken it to a situation where a group of people at a party are talking about a subject...and then an outsider walks up to the group and proclaims "I really don't care what you are talking about". Everybody's reaction would basically be Image: http://www.realsportslounge.com/images/smilies/jaguars-fan-gif.gif
To me it is the same on a message board.