I have turned off "Manage Activities" which appears to be the only way to remove the Edit Settings options on items (specifically looking for a way to make settings on anything with dates/grading not available). However, this also appears to turn off the Activites available under "Add an activity or resource". (Yes, I have made sure that Add an Assignment allowed.)
I have tried the opposite approach to leaving Manage Activities on and turning off Manage each item but that doesn't work either.
Any suggestions?