Actually you can.
It is possible to auto login as a guest and go to the openingspage of the Scorm
Than, you only have to click Enter to start the Scorm.
The magic is in the link you use.
Go to the page where you can choose the course.
Right click the course and copy the link. It will give you something like this:
http://www.process-stimulation.eu/LMS/NEW/course/view.php?id=30
Clicking this will make you auto login and brings you to the openingspage of the scorm.
Click enter to launch.
All other links will redirect you to the login page
For example this: http://www.process-stimulation.eu/LMS/NEW/mod/scorm/view.php?id=26
I handled this in https://tracker.moodle.org/browse/MDL-57947
Have fun
