I think he said they were together in
an online chat. Its very common for folks not to share their P&L in a chat room. I don't know if Baron (ET) owner stores the archives of his chat room here at the forum but it was rare for folks to share their P&L, account size, position size or trades although a few did.
Yet, traders in an
office would know by glancing over the others shoulders. Folks just tend to share more when in person in comparison to a chat room.
You'll be lucky to get the person's
real name in a chat room.
In contrast, traders in an office tend to get information about the other just by "observation". I traded in an office for many years and we all knew each other's name, food we ate for lunch, when we tend to go to the toilet, who farts the loudest, type of clothing being worn, who smelled because they didn't take a shower last night, who looked like they needed more sleep, P&L, account size and many other things you typically do not know in a chat room.
People aren't hiding in a chat room. I think most just think its none of any body's business especially when others in the chat room are
anonymous whereas in person as in an office...you're
not anonymous...you just know (observe) the other persons in the office and you'll know what's going on including who farts the loudest.