in reply to
Re: Assigning unique identifiers within a discussion thread to each distinct anonymous commenter
in thread Assigning unique identifiers within a discussion thread to each distinct anonymous commenter
Cookies would seem to be an easy way to implement this, particularly given that this is in no wise intended to grant every AM a unique identity for all time. They can create an account for that. If a thread goes on for weeks, and for some reason AM-27 becomes AM-34, it's not a big deal. Similarly, if someone logs in from one browser to comment on a thread, and then logs in from a different browser to comment on that same thread, it's not a big deal for them to be both AM-27 and AM-24. Again, that's what accounts are for.
As for whether to use digits or some other identifier, I have no particular opinion. Digits would seem to be sufficient, but I'm willing to believe otherwise.