My arguments for doing this:
1. The chat is moving incredibly quickly now. I can imagine in 6 months it will actually be impossible to keep up with it, in the present structure. edit: guess it varies as now it's slow, but it's definitely too fast at times for me
2. With so many people investing into alt currencies, there is constant 'car sales man' talk on the chat. This was there before but now it's literally non-stop. It's a shame because I used to enjoy talking there but now it's almost a non-stop shouting match mixed with trash talk
3. If I was a newcomer who had just bought some bitcoins and was investigating alt currencies and I went onto that site, I would be put off by the stream of 'Buy Ltc!', 'No buy TRC LTC crashing', 'LITECHICKUNN!!' etc. Never used to be this bad and it doesn't create a good impression.
And I know I can hide the chat, I have just stopped reading it now...