If you want the warn to be gone, argue your case following the format for false warning appeal in the report center section.
I’ll say this:
I agree with you, I have no clue why people think that others new to the server would know that trying to break out of cuffs is FailRP in any sense. I’m pretty sure it’s not specifically stated in the rules anywhere in the first place (someone can correct me if I’m wrong). It’s not “common sense” to know that you wouldn’t be able to break out of cuffs if the add-on literally allows it, which is a pretty persistent problem across a lot of gmod servers, not just GL. Of course, sometimes the best addon must be chosen as I’m sure creating one specifically for the server would be very time-consuming. As a result of that however, there should be a SPECIFIC rule stating whether you can break out of them or not.
On Joker’s side, it seems you were being blatantly disrespectful, but it’s really hard to see how you two were actually interacting with each other without any video evidence.