Can exploiters edit LocalScripts or add them into the client?

Of course! No problem. If you have any other questions, feel free to ask.

You have absolutely no clue what you are talking about when it comes to exploiting, command line has a higher security than a injector, this wont work

If this did work there would be thousands of reuploads of popular games with fully working games, but there isnt, as you cant do this at all, the info inside the script is never sent to the client as the client doesnt need it.

looks like you read nothing at all of what was said before