how can i apply different privacy setting for different classrooms?
It is very logical.
Do you know how websites are made?
Programmers have to write all the HTML code to make a website, so a lot of web design limitations are due to the impracticability of the HTML code needed.
Managing that many tables of variables would be tough on the servers, and the back-end server side scripts have to take a lot of pressure.
This could cause server crashing and other issues.
So it is actually very logical.