If they do force you into google forms and you can't send a letter then that's a potential issue.
replyMaking you run javascript is a weaker argument...
Don't they force you to sign up for a Google account to be able to gate access to a Google Drive file?
replyNo. As long as the sharing permission is “Anyone with the link”, then anyone can download from that link with wget or whatever.
replyIs that the permission they use? Who knows? But it’s at least possible.