Well, Bitcointalk accounts to impersonate famous members are similar to fake url's, where scammers try to change a letter or use similar ones. Fortunately Bitcointalk letters for creating an account are limited, such as different letters, like from kyrillic don't work.
Some fake profiles are these ones:

theynnos  https://bitcointalk.org/index.php?action=profile;u=366380
therymos  https://bitcointalk.org/index.php?action=profile;u=392907
OqNasty  https://bitcointalk.org/index.php?action=profile;u=360247

'OgNasty  https://bitcointalk.org/index.php?action=profile;u=1072413
OgNasty.  https://bitcointalk.org/index.php?action=profile;u=521187
...

these ones are not possible in Bitcointalk: