Traditionally Moodle has been designed so that "everything" works with JS disabled..

We've added a new option to settings > plugins > activity Modules > SCORM package to prevent access to SCORM objects if JS is disabled in a users browser - this setting is disabled by default but I'd like to change it to enabled by default for new installs/upgrades.

if a user has JS disabled it doesn't store any grading information - it does print a notice to the user to let them know, but usually they ignore this.