Recently made me a user of gis.stackexchange.com. I can see there is an older user, with the same username as mine. Tried to change my username, but there is a 1 month delay. Are there any reason why usernames are not required to be unique? I know this is only an issue up front, since stackexchange uses another key to separate user with the same name regarding profiles.
Some arguments are:
- In real life there are repeated names,
- If your are not the first one to come up with a name, you would need to try a lot (depending on the situation) to get a unique ID.
- Everyone should be able to use his own name.
There are other arguments.
Below, there are 2 other Stack Exchange threads that discuss this issue, and they also have advice if one wants to avoid repeated IDs.
For example: add a nickname after the real name.