I suppose the new ease of changing usernames might allow scenarios like this:
User A is called 'Velocity Boy' and changes his username to 'Velocio'.
User B changes his username to 'Velocity Boy'.
Or:
User A changes his username to something else for a laugh, intending to revert the change an hour later.
User B quickly hijacks User A's former username.
I suppose the new ease of changing usernames might allow scenarios like this:
User A is called 'Velocity Boy' and changes his username to 'Velocio'.
User B changes his username to 'Velocity Boy'.
Or:
User A changes his username to something else for a laugh, intending to revert the change an hour later.
User B quickly hijacks User A's former username.
Are these cases possible?