Wow, what horrible advice. It might escalate if you get a restraining order? Yea, no shit, but then they can also go to jail. If someone is harassing you, silence is not the solution.
A bully might beat you up if you tell someone what they are doing, but it will more likely get you the help you need.
Maybe not for your specific situation but that is really bad advice for victims. Speak up, take action.
I'm suspicious of the whole thing based on that advice. It's basically victim blaming, and I have a really hard time imagining an FBI agent saying "avoid restraining orders because your stalker will probably kill you and get dogs because lol you are just fucked." That's a very shitty tone to take and is practically masturbating atop a victim's fear. Regardless of opinion on LE, I can't imagine someone who made it to the FBI even holding an opinion like that. Someone in Arpaio's MCSO maybe.
Something smells with that entire story. If I had to guess, it has something to do with us hearing it thirdhand because we are very clearly relying on the interpretation of at least two people, and it's also conveniently tied in to the overall narrative of LE being completely useless. Also weird that those parts are okay to discuss publicly but the rest isn't. It's not worth me continuing to call it out, though, so I'm just letting it go.
A bully might beat you up if you tell someone what they are doing, but it will more likely get you the help you need.
Maybe not for your specific situation but that is really bad advice for victims. Speak up, take action.