How come there are hundreds of users with the same name?
33449
Why does Stack Overflow allow duplicate display names?
118227
What do the groups do in "Users and Groups"?
78288
Each login creates a new StackExchange account
63450
Why did this edit get attributed to the community user?
110889
What is the most rampant duplicate on Stack Exchange sites?
22176
Keep short history of user display names
55873
Significance of the users like 'user'
72324
How many users are there on Stack Overflow?
38992
Is the duplicate answer flags raised for exact copies of answers of different users?
115301
Can I Prevent Enumeration of Usernames?
85756
How to find users by name
135805
Can we restrict the ability of users to keep changing their names?
25962
Are user names that represent domains allowed?
78378
Where in the world do Stack Overflow users say they are from?
28812
What's all those users in the /etc/passwd file?
58684
Best Practices in Username Standards: Avoiding Problems
38101
User’s/Users’/Users Group