The admin not allowing email addresses as usernames still irks me, such a seemingly pointless restriction in this day and age. Decent response to the original

The admin not allowing email addresses as usernames still irks me, such a seemingly pointless restriction in this day and age. Decent response to the original article, though I have to admit that I have a pet peeve about developers declaring libraries/frameworks "insufficient", "lacking" or "fundamentally flawed" as an excuse to write things themselves. Or maybe I'm just grumpy.