How can I turn off a signature?
At the top right of every person's signature there is an X. If you click on that X you can ignore that person's signature or signature's overall. If you've ignored someone's signature it will not show to you, even if it's been updated, unless you opt to stop ignoring that person's signature in your ignore settings.
I would like to stop getting poked. How do I do that?
It is not a feature yet to opt out of the reset notifications however that is something we are looking into for the future.