Who has access? I have sent files via GD to people, adding names as needed. Have you granted open access to anyone at all?
Not using GD more than once a month, I have not seen any spam, so I am a GD newb?
Based on the content in the article, you don't have to be a heavy user of Google Drive to see this sort of spam, nor do you have to send anyone files.
This is not about protecting the files you share, it's about spammers abusing the file sharing mechanism to send you notifications. THEY share a file with you in order to trigger a notification and there's no way to block this.
Ah, I see. Have never got one, fingers crossed. I am not a big user...