After reading the first page, the reader is forced to register with his email address in order to continue reading and that's when your effort goes in vain, because many, including me, will not do that.
SA is a useful site to be registered on. Even if just for transcripts.
If you do not want to give out your email, create a "trash" email account and use that. You probably should have such anyway as there are many similar cases of where somebody wants an email, and you would rather not give not out.