Roger Stanyard's Departure And Return
In mid-2007, the BCSE's founder and de-facto leader fell out with his colleagues, and left. A fortnight later, they made up and he was back. I discovered this and started blogging about it - but without disclosing my proof to begin with. The BCSE responded with the most outrageous campaign of smears and lies, believing that I didn't have any evidence. This decision turned out to be a disaster when I produced the evidence - showing the moral vacuum that went to the BCSE's core, as a majority of the BCSE's leadership was shown either to have spread slanders they knew to be false, or to have made no protest when the proposal to do so was made.