To request blacklist of certain commands do the following
In Discord, open your User Settings by clicking the Settings Cog next to your user name on the bottom.
Go to Appearance and enable Developer Mode under the Advanced section, then close User Settings.
Open your Discord server, right-click on the server name, then select Copy ID
Once you have the ID of the server use the live chat feature and follow this format
Your server should be blacklisted from these commands within up-to 10 hours (average time is 30 minutes)