When a serious action is going to be taken for any reason, that action should be PRECEDED by at least an E-mail to the owner and the path to reverse the action should be clear. The E-mail should not just be a terse message, it should contain a wide variety of resources; something like: "Your account and applications
will be disabled in 2 days for
<reason>. Please select from the following links to attempt to resolve the issue, or call
<number> as soon as possible.".
It’s not just apps, either. There is frequently a “less disruptive” option for any major action; for instance, you can “delete” files by starting with the instantly-reversible "chmod 000", and after some period of time you actually go ahead and "rm -Rf". If, in between, a panicked user E-mails you back and says they really needed those files, you undo your "chmod" and instantly fix the issue. Why should anything on the App Store take days?