Which is why he just said they could be pseudonymous. You know, have a pseudonym. So you can tell the Titans apart, but you can't tell who they are IRL or IC.
Wouldn't iot be fun to make a pseudonym of "Tom". Teehee.
But, more seriously, pseudonyms will do very little. In a game where a not insignificant number of players regularly study each others' writing habits in an attempt to mimic and forge each others' letters, and where we all read each other quite regularly IG and on the forum, I do not think a pseudonym will be any protection of identity.
