About user profile sef urls exploits joomla usernames

Hi,

i recently installed easydisquss on my website that i have joomla! sef enabled and i realized that all of my website's users and admins usernames are now publicly available.

The profile url ends with the users username , this is serious problem that makes hackers life easier and possible brute force attacks possible.

Please provide a solution because i will be forced to remove the extension from my website asap.

Thank you