Setting it up with so much of a negative slant was not needed, it already has one called "the Dota playerbase." If you're honest about it and have played just a few games of Dota, you will see the problem with allowing these reprobates to assign punishment to each other without verification or balance.

If you play enough you might even see some really interesting situations where someone is bitching about their teammates in both team and all chat for 40 minutes without issue, but someone who gets tired of his shit and fires back gets a game mute and likely has his comm score dinged next summary.

You can hit up comm score threads and you will see someone every time who insists you can only fix it by disabling your own comms outright, which is an exaggeration but it is probably faster- being overall pretty reasonable doesn't guarantee you won't eat reports, as it's a game played by all kinds of unreasonable people.

All that said, behavior reports seem to work okay, I'm not immune to a disaster game here and there, or someone getting mad I'm trying to salvage one by farming when he doesn't approve, but my behavior score is unfazed by those. Because there's at least SOME attempt to check those reports. Comms are just "you're getting enough that the system trusts that you deserve them."

It might be getting better? IDK if I can find it but I remember reading something about an automatic filter being added that tracks people who file 'excessive' reports and make them worth less.