Hi Scipio. I have no idea what forum rules are on this, or indeed the rules of your own professional body, but if a poster wants to lay claim to being a member of a professional body and post from a position of authority it strikes me that he/she should be required to authenticate?
Honestly I don't care whether anyone believes I am a lawyer or not. I am not going to bother to present my name for people to call up and harrass me, family or co-workers. I have not suggested that someone should believe what I am saying because I am an authority. I present evidence and sound reasoning to support my positions. I do not accept unsupported claims from people just because they supposedly are an authority nor do I advocate anyone else doing so. Too many times I have found authorities rendering unsupported opinions to be wrong. One such case is here where this lawyer claimed there was an evidentiary basis to claim the suppressor was contaminated. I explained why he was wrong using evidence.
Even in a court of law we do not simply accept unsupported opinions of experts. Experts must explain why and how something is the case so their claim can be evaluated for accuracy. If they don't explain at all or sufficiently then they will be furiously cross examined and have to explain on cross whether they had a solid basis for claiming what they did.
The only reason I mentioned the realities of what trial lawyers face is to try to help people understand the limitations at hand. Including understanding that a claim can be a double edged sword and result in admission of evidence that is damning and would otherwise never have been admitted or will highlight things the other side would not have brought to the attention to the jury even though they could have. Moreover to try to give a better understanding of what reasonable doubt really means. Reasonable doubt is in theory an objective standard. Is it reasonable to assume that a fingerprint was planted without any evidence to suggest that it was in fact planted? No. Just because it is possible to plant a fingerprint and therefore there is a remote theoretical possibility that a fingerprint was planted that doesn't mean there is a reasonable probability it happened. If there is some evidence to suggest that it was in fact planted then it is a different ballgame. In that case you can establish a reasonable probability it could have been planted and that constitutes reasonable doubt with respect to that piece of evidence. There must be reasonable doubt with respect to every piece of major evidence though.