I think it's just because there are continuously several CS threads on the first page every night. I have nothing against it. It would be great if y'all could devote one thread to CS and keep it nice and tidy, but it's not that big of a deal. I just skip over 'em.
I don't mind them myself- but i think part of the reason is the fact why some people find them annoying is that there is already a forum for software/games etc. Generally mods move threads into the most suitable forum- but not generally in OT.
From the CS players point of view the Software forum is pretty dead most of the time- if they want people-this is where most hang out.