If Nightshade relies on vast swaths of art being poisoned, why not automate the process?

what's stopping me from writing a script that scrapes images from sites like pinterest, adding nightshade, then reuploading the output back to those sites?
other than my lack of technical skills.

im a very novice programmer. but i'm wondering why something like this hasn't already been made. is it issues with apis, rate limits? monetary cost? complexity?
please, can someone smarter than me help in breaking it down? im not sure where else to ask (and i'm maybe also afraid of posting in coding subreddits.)

it would also be cool to make a website that allows artists to automate the process of replacing nightshaded versions of their art to sites that allow users to edit existing posts (ie. deviantart, tumblr). maybe the scope is too big.. but i can dream. cant i?

what's stopping me from writing a script that scrapes images from sites like pinterest, adding nightshade, then reuploading the output back to those sites?
other than my lack of technical skills.

im a very novice programmer. but i'm wondering why something like this hasn't already been made. is it issues with apis, rate limits? monetary cost? complexity?
please, can someone smarter than me help in breaking it down? im not sure where else to ask (and i'm maybe also afraid of posting in coding subreddits.)

it would also be cool to make a website that allows artists to automate the process of replacing nightshaded versions of their art to sites that allow users to edit existing posts (ie. deviantart, tumblr). maybe the scope is too big.. but i can dream. cant i?