This whole aerobatic thing really does need a bit more thought IMHO.
Nothing stopping a freshly minted PPL going out and playing silly buggers with a C150 acrobat.
Nothing stopping an instructor, who is not aerobatic qualified, going on a check flight, and the checkee decided he fancies doing a few loops and rolls. Instructor can log the flight
Nothing stopping the instructor, who has never been upside down in his life, performing aerobatic flights with a student onboard. Legal, as long as he doesn't log it as an instruction flight.
The AOPA syllabus is 10 hours, yet the restriction removal is 5 hours, with no stated experience requirement.
Playing devils advocate here, but perhaps there should be a qualification issued for aerobatics. Based on the AOPA course and you can't be an aerobatic instructor without the qualification before hand.
It unfortunatly goes against my belief of making flying more accessable. ho hum.