Re: I find the argument bizarre
There's a multitude of things that would pass the bar of gross misconduct in a company, yet it isn't necessary to list every single act explicitly in company docs because any rational, moral individual knows right from wrong.
There's also the fact that these people were previously warned about their behaviour but carried on anyway. Seems to me that they cared more about their crusade than they did their jobs, which is fine but it's a bit dramatc to complain about being sacked for breaching company policy repeatedly and maliciously.