I noticed that when changing the recipient email addresses on the Contact Form, these lines appeared in the System Log. I didn't alter permissions at all. This doesn't appear to affect functionality but I though I'd let you know ...
2013-04-29 09:09:59,791 INFO 82.69.43.209 - en-GB - /Admin/ModuleSettings.aspx?mid=24&pageid=15 - mojoPortal.Web.AdminUI.ModuleSettingsPage - user XXX changed Module Edit roles for Contact Us to XXXYYY; from ip address 82.69.43.209
2013-04-29 09:09:59,791 INFO 82.69.43.209 - en-GB - /Admin/ModuleSettings.aspx?mid=24&pageid=15 - mojoPortal.Web.AdminUI.ModuleSettingsPage - user XXX changed Module Draft Edit roles for Contact Us to from ip address 82.69.43.209