This is why I always use a Chrome incognito window for everything I don't completely trust. No big deal in this case because I'm not logged in to anything when browsing. If a site prompts me to log in to Facebook or twitter (as in this case), I know something is fishy. Is it a bit more of a hassle? Yes, but not as bad by an order of magnitude of getting an account hijacked. My biggest friend is right-click and "Open link in incognito window".