I agree. It certainly would be inhumane not to help or guide someone to seek professional therapy. Your doing the right thing by guiding them toward therapy. You are more than qualified, you have to give the best advice on this forum
Of course, you should always encourage someone to seek professional therapy, but that's the key you have to not only tell them what you think they may have, but guide them to get checked out by a professional, otherwise you're not really helping anyone at all you're just giving them your opinion concerning what's going on with them. Furthermore, you should encourage the individual to learn more about the suggested disorder because otherwise they may be acting on misinformation or media portrayals, which often portray DID and other mental health issues as making a person dangerous and crazy. If they are acting under these assumptions it may discourage them from seeking help or they may disbelieve the claim because they are assuming the portrayal of dangerous and crazy is accurate and they do not view themselves in such a way.
Kit