If I put a project on github that says "don't use this with mysql" and you use it with mysql and it drops your tables is it sql injection? Seems very different to me.
You are authorized to do what the user agreed to, no more. Further the agreement must be reasonable. Exploiting the victims system to intentionally cause harm isn't reasonable.
F-secure once included a clause to use their wifi that you "assign their first born child to us for the duration of eternity." It was funny, but not legally enforceable and would have offered them no legal shelter if they'd gone out on a kidnapping spree that night.