You are right, not only on FPA but there are many websites, forums and social media groups where you can easily find out about any broker's reputation. But still the very good method is to ask your good trader friend or your mentor to guide you properly.
I think there should be no discussion at all about this because there is no better site to get review about broker then FPA, so if a broker is listed as a scam here I am not trading with them, I don’t prefer to take risk with my money and luckily I survived losing a lot due to checking from here as I was about to start with a scam company but after reading the view I rightly not did that and selected a trustable company.