Since you are King over your Content, you can decide for yourself if it's benificial to you and your web site to allow or restrict any user to do anything on your site. In the strange event you'd like to add some Drupal Misery to your Joomla site, we'd advise you to have a closer look at Joomla's Metamod.
Some user related suggestions on how to use Metamod are:
- Show a module if a certain user is logged in to the front-end of your site
- Make modules appear and disappear, or alternative modules appear, for different users, based on user type, group or even login name
- Make a module disappear once someone has logged in
Metamod allows you to create a tree of rules per user or user group (or date, time, recurring time, country of viewer, browser type and language, page within other component (e.g. Virtuemart), on-page text, by article keywords, individual article, section/category, etc.)
You can use Metamod for enlightning stuff for your users as well, by creating rules based on birthday, gender, location, browser language or whatever.
General Advise: Add 'Misery' when it fits the concept of your web site (ie. your fraternity site)
General Request: Don't add any 'Misery' using Metamod with our user account on your site :)
Why wait? 
