Ability to remove email address(es) or/and 'Do NOT Send' consolidated email report to users?

1st, thanks so much for building this incredible tool! I've just come across it and am trying to learn its features to help our congregation determine if they would like to use it.
2. As I test in the system and for down the road, is it possible to remove a user's email address? When setting up a user there is a box to note no email, but I don't see that once they are created.
3. Is it possible to NOT Send the consolidated report to users? I want to set them up and test and use the system without having emails auto-send to anyone for anything. In the future, certain admins may want to even use the system without the auto-notification features.
3. Does the app work best on certain browsers? I noticed some grids not displaying right on Chrome, but all seems right on IE 8 (on my work Computer)

Thanks again!