List of usernames with special characters:

1. ._.

2. banned-user.1

3. banned-user.2

4. banned-user.3

5. banned-user.4

6. banned-user.5

7. banned-user.6

8. banned-user.7

9. banned-user.8

10. banned-user.9

11. banned-user.10

12. banned-user.11

13. banned-user.12

14. crystalkeeper7.old

15. david (admin)

16. deleted.account.meower

17. impossible usernames

18. griffpatch.old

19. joshatticus.old

20. scolder.renamed

21. tris.banned

22. wasteof.money

23. willy.