Original sentence: Servers can sometimes (the situation frequently changes) be modified to allow illegitimate and legitimate users to play alongside each other.These servers are able to use VAC and other anti-cheat tools to ban cheaters, but naturally the schemes are not effective in an environment where new identities can be created instantly and freely
Edited sentence: Cause for concern, as the 'non-steam' community grows because of their opinion about Valve as a company and Steam the client.Servers can currently be modified to allow illegitimate and legitimate users to play alongside each other.These servers, known to many as "non-steam", can use VAC2 and other anti-cheating methods like cheating-death to ban hackers