@annika If you are concerned about abuse, only one appeal can be submitted, limited by characters, and only within 20 days of the decision. Since you got a notification about the initial report in the first place, this is a matter of potentially just one more notification.
Since people can complain to you through e-mail (and it is not advised to not provide a contact e-mail for legal reasons) I think it is in any case preferable to have that in the system instead of e-mail.
@Gargron @annika
Make appeals and federation opt in. It does not hurt you to do this.
Server runners don't another damn tax on their time from all the entitled nazis.