How does spam protection work on Stack Exchange?
If you put a textbox on the Internet, someone will put spam in it. If you put a textbox on a site that gets millions of hits a day, lots of someones will put lots of spam in it. So Stack Exchange uses multiple layers to block all the spam coming in.
![](https://cdn.stackoverflow.co/images/jo7n4k8s/production/6fdb0ff4e9cc2e8c8dd1d930733e4141a93fad91-2400x1260.png?rect=1,0,2399,1260&w=415&h=218&auto=format&dpr=2)