Bruh, he didn't say that it took that many reports, he said that the dude had gotten that many reports over the account's lifetime. That doesn't mean it took that many, just that there were that many over the account's history.
The dude could have had numerous false reports in there somewhere, as well as up to hundreds of reports for other things before they started trolling.
I think this is more a case of you misinterpreting the data than a case of it actually taking 511 reports for someone to get banned.
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"You have been reported 511 times in a little more than a month" - that is the direct quote from the post, i think we somehow confused tantrams lifetime report count statement which was in reference to his own accounts, not the guy who got banned.
Probably just misread.