The name of the mod deleting should be transparent.  If that is not going to happen you should be shown a percentage of deleted posts that have executed from each mod.

If mods are found to be bias or vindictive then they must be replaced. I have witnessed some seriously concerning behaviors raised and the evidence was incredibly robust.

The same for reporters, you should see a percentage of reports that originate from each member.

Reporters themselves should see a percentage of marked bad etc for each mod.

If you notice one mod deleting all of your posts and marking your reports bad. You would need to have that investigated.

This would be an easy feature to implement.