We all know that the kind of person that would buy this script off you wouldnt be able to understand the code (or they could make their own script) so you can easily add in something malicious.
Tbh to me it just seems like you just started programming this school semester and then you realise you could try to hack people with malicious scripts.
Just seems like you havent really thoguht about how you are actually going to present your idea to your targetgroup LOL