Valve's Steam platform is a big place with a lot of people, and as with any community like this you'll find controversy emerging, although GamesIndustry.biz has reported that Valve is tightening its stance on hate groups on the Steam marketplace, as lots of these communities have allegedly been deleted, including those dealing in racism and sexism online, some of which have even been celebrating school shootings.
Even groups that GamesIndustry.biz commented on back in September have been removed, something that has continued into groups that haven't been linked by press. They also report that if you were to search terms like 'nazi' you will only get groups opposed to these topics now, rather than promoting them.
Not everything controversial has been addressed, as some offensive groups still remain, but it's great to see that Valve is taking action, even if they aren't making a big song and dance about it themselves. Do you think this is a step in the right direction for Steam?