If you have chosen to write and publish an online tutorial, are you liable for damage or negative outcomes that may occur if you write your tutorial badly?
It's a good question. I notice an ebook usually has a disclaimer stating that the ebook is for education only, and neither the author, publisher or distributors take any responsibility for any damages caused by using any portion of the ebook. I think an online tutorial should have such a disclaimer also.
Disclaimers are always a good idea. Better safe than sorry, as the saying goes. If you have any concern that a tutorial you've written might lead someone into dangerous territory, you should probably consult a lawyer as soon as possible.