Sorry dude, but this comment makes it clear you have no idea what you're talking about. If I'm given an assignment to write a program that generates a huge variety of novel cat drawings, which won't register the same in this database, I bet I could personally single handedly have that done in a week of work.

Some other problems :

1. Many real humans will draw roughly similar cats. Unless you compare the drawings pixel by pixel, or very precisely, then there will be lots of false positives.

2. If you then decide to compare the drawings pixel by pixel or very precisely, then I can trivially generate new drawings by altering them. I have plenty of time to reverse engineer how your database is comparing things even though you don't tell me when I get a strike because I can make lots of fake accounts via hiding my IP address and run experiments by feeding different variations of drawings and seeing which ones eventually get banned.

3. If you ask once every couple of months, then my bot gets to do three times whatever that duration of months is worth of damage and misinformation before it gets banned. That's a pretty long time, especially for a bot. I can deploy new bots much faster than your system gets rid of them.

4. As Anivia pointed out, I can pay real humans to draw the different cats for my bots when needed. This is especially trivial because I can just ask them to draw a whole bunch of cats in advance. I don't even need to wait for the cue from the system. I can just have a big library of pre-drawn cat drawings that I upload as needed.