Sho and Shiny said it best. Chat, like any organic active conversation - in real life or otherwise - has its active moments and its lulls - especially when most of us are either multitasking or having lives not dedicated to entertaining random bored twelves. Quality over quantity is one of the guiding principles of 'Charms as a community (or at least, we strive to keep it that way), and continuous streams of blather that never stop (or, in other words, spam) as people don't stop talking to the point of ignoring each other completely? Yeah, no. Not on our watch.
And even if we were inclined to entertain this ridiculous notion, it would require someone to actually moderate chat continuously to make sure people are talking - which is not practical or possible due to staff members in PARTICULAR having lives not dedicated to entertaining random bored twelves.
On an encouraging note, there are plenty of other Pokemon related communities whose chat rooms look exactly like that - you're welcome to go there if you want to burn out whatever remains of your neurons.