None of the people who've said "Help, I've been unjustly banned" are comparable to someone stealing your wallet (unless you, say, got aimbotted by them). They're comparable to someone who's been punished for stealing wallets, who is saying "I've been punished for something I didn't do! Help! What do I do?"
But they are complaining to the wallet manufacturer, not the police.
This is the whole point. I've explained in several posts (as J!NX noticed) why being VAC banned is not evidence that a person cheated.
That is like saying that being in jail isn't evidence of commiting a crime.
http://en.wikipedia.org/wiki/Evidence
wikipedia posted:
Evidence, broadly construed, is anything presented in support of an assertion. The strongest type of evidence is that which provides direct proof of the truth of an assertion. At the other extreme is evidence that is merely consistent with an assertion but does not rule out other, contradictory assertions, as in circumstantial evidence.
It may be circumstantial evidence, but it IS evidence none the less.
And like in the analogy of the pickpocket the evidence is held by the police (Steam). We assert that Steam continues to do their due diligence in building their cases. Therefore we can assert that a VAC ban is evidence of cheating.