We need to stop calling these "Petition to <thing>". These are not petitions for things to happen. This is not a petition to make phone unlocking legal again, it's a petition for the Whitehouse to write a response.
Furthermore, these petitions aren't going to be seen by lawmakers, as someone in the below comment says. Strictly speaking, the President is part of the executive branch, not the legislative branch, so in any event, no "lawmaker" will be seeing these petitions at all.