That's why when someone breaks in my house and I can legally kill them, I never report it to the cops. I preheat the oven, put on my chef's hat, have sex with the dead body, and then get to work to prepare dinner!
“There is no law…” is a singular use of law. Perhaps: “‘There’re no laws”?
I didn’t use a full stop or apostrophe at the end of the sentence?
The bottom caption is the standard meme format.