Belz...
Fiend God
I am a little puzzled as to why you would refer to legal proceedings as the presumption of innocence is the burden the accuser has to overcome to the judgement of a reasonable minded jury of your peers.
In other words you got stuck with the word "court" and didn't seek to understand the question at all. My analogy with the courtroom deal was to illustrate that the claim doesn't make the case. Your point is irrelevant to my question.
CAN you or can you NOT use someone's posting history as evidence for that person's beliefs, regardless of what they say ?