I do. Because when I was doing mainly corporate flying outside an AOC, I have been reported to the authorities dozens of times. And inspected and questioned dozens of times. Not by LBA (because it is really not their business!) but by the local aviation authority ("Landesluftfahrtbeörde") who has a person in charge ("Beauftragter für Luftaufsicht") at every airport and licensed airfield. But LBA should have told you that when you tried to report illegal activities? Even SAFA checks fall under the responsibility of the local authorities, not the federal authority (LBA).