Anniebach Are you comfortable about a person who has formed an organisation to oppose a leader overwhelmingly elected by members of the party concealing his identity? Jon Lansman was open about his role as founder of Momentum, unlike Reg Race of the anti-Corbyn Saving Labour group. So, even if you know nothing about Jon Lansman (and I did not until I looked on the internet), at least you know who he is and can find out about him quite easily, without investigations having had to be carried out to find out who he is.
Jalima Why is Lansman "shadowy"?