Registration using username which contains digits only

[unhappyuser]

A registration page said me this: "Invalid character used in Username". Are this is impossible?

[unamis76]

It's like it says. You've got to have at least a letter.

[unhappyuser]

But I do not want use any letters. This thing is weird. Are this improves something?

[shorena]

But I do not want use any letters. This thing is weird. Are this improves something?

Previously it was possible to have a username without any visible symbol or was visually identical to another username, which - as you probably can imagine - lead to issues. I suspect that the new rules are a bit stricter.

[unhappyuser]

This one clears up for me, a bit. Thank you. Very interesting, what a potential attacker can do if this restriction was not exists?

[LFC_Bitcoin]

But I do not want use any letters. This thing is weird. Are this improves something?

I don't get your problem with using any letters? Why is that an issue?

[shorena]

But I do not want use any letters. This thing is weird. Are this improves something?

I don't get your problem with using any letters? Why is that an issue?

I think they just wanted to have a name like '1337'[1], but even though it was free the rules for usernames somehow do not allow that. I dont know why exactly, but I know - as I posted above - there had been some issues with account names recently and that might have resulted in overly strict rules. It might also be totally unrelated and the rule is in place longer.


[1] that user actually exists -> https://bitcointalk.org/index.php?action=profile;u=10704