Disable Inspect Element
 

How can I prevent people from using "Inspect Element" on google chrome on website? It can allow them to change numerous form fields.

Inspect Element is a feature pretty much all browsers have and there isn't a way to block it.

If you make security checks in your code you can make sure no one edited the form fields.
It's called SQL Injection and it can be done using those unless you have serverside checks.

Most of Mysidia has to be recoded to prevent those because if someone uses the right SQL statement they can drop your whole database and that wouldn't be good.

Well yeah, this is what I have been working on for Mys v1.3.0. It is definitely more tedious than the itemshop and user profile tabs project, which is why Mys v1.3.0 is not ready for release until next year.