When users first use Stack Exchange, usernames are automatically assigned for them. (They don't pick one themselves, as that would increase the number of hurdles to jump to use the site.) The usernames are of the form user#
, assigned according to user ID number; thus, the user with ID number 314159 is assigned username user314159
.
This similarity of username is[1] confusing to a moderator, who sometimes needs to remember things about users from one day to the next in order to keep track of a pattern of behavior. I propose that, instead of user314159
, a random word from the English dictionary (vulgarities removed) is used.
[1] Personal experience.
user1234567
format to be a problem.