So far I found 21 screen names that start with Y.W. Moderator, but I am sure there are many more out there.

Y.W. moderators 007, 12, 13, 20, 21, 25, 29, 36, 39, 42, 55, 72, 73, 77, 80, 81, 99, 100, 105, 127, 613.

How many are there, and how many are real mods? Most of their subtitles say Moderator, but many say Member. How many are still around?

Mods, why did you choose the numbers you have?

I can think of possible reasons for 007, 12 (bas mitzvah, shevatim), 13 (bar mitzvah), 42 (The answer), 72 (Sanhedrin), 127 (Sarah Imeinu, Medinos) , 613 (mitzvos). Many numbers are consecutive. Did 21 choose it because he was after 20, 73 after 72, 81 after 80 etc.?

What about the rest.