you can usually sus out a troll with a few clicks, takes no more than a minute
click username
click system
click marketplace feedback
click responses and discussions started
in this case... joined in 2020, nothing under system, not a single buy/sell transaction on audiogon, zero feedback -- but has started (not responded, to, but STARTED) 176 threads
patently obvious what this is... it starts with bull and ends with sh*t