Without going into details, briefly you cannot say anything that lowers people in the opinion of right-thinking members of society.
So in this case you can't accuse someone of a criminal offence unless they have been convicted.
If someone has discussed committing an offence in the past, with or without conviction, you can refer to that, but if they've said they don't do it any more, you can't say that they are lying unless you have solid proof. That goes for whether you say it or imply it.
Like I said, there's no reason why people should understand, but once it's pointed out, it's not that difficult to grasp.
BTW, I didn't report any posts, and though I don't agree with your POV on Allen, I think what she does is up for debate and I don't think the thread needed to go. Though some posts would probably start to piss me off and my finger would hover over the red button.
But, hey, that's the job...