Why shouldn't data be modified on an HTTP GET request?

Question

I know that using non-GET methods (POST, PUT, DELETE) to modify server data is The Right Way to do things. I can find multiple resources claiming that GET requests should no

Answer 1

Security for one. What happens if a web crawler comes across a delete link, or a user is tricked into clicking a hyperlink? A user should know what they're doing before they actually do it.