It deters long-term users from participating. The daily grind of the baseball season is wearing enough on people and this place is something of a refuge for people who want to enjoy baseball without insults and the general dumpster firey-ness of the rest of the internet.
And persistant, problematic game threads go against us providing that refuge. In no way am I saying that everything needs to be sunshine and roses, only that grinding the same gear night in and night out needs to stop.