I just found this and thought i’d share.
It’s a bit sneaky, but i say the fault is with Adobe for making their service too obviously hackable!
If it helps anyone, i made a bookmarklet. Just drag it to your bookmarks toolbar and it’ll be ready to click anytime you want to make a PDF.
I am making no guarantees as to how long this will work. If i worked for Adobe i’d like to make this feature a little bit more secure, heh!