Sucks to hear, but you kinda dug your own grave. Never wear rare items while doing something like fishing...by doing it, you're taking the chance that something bad will happen. I can't blame the guy that wouldn't give your hat back either. He didn't scam you, he didn't hack you, he didn't cheat you out of it...you made the mistake of risking it, and unfortunately, in this instance, you had to pay the price. I wish you good luck though, and I hope you can get back on your feet soon.