It's not paranoia. Once you start straying from the path of responsible disclosure, the path to danger is quite short.
In this case, I think you're in no real danger since it's Twitter. So don't worry. But if it were some other company, though, you wouldn't be able to rely on goodwill to protect you. And without any protections, there's nothing preventing the (extremely powerful) courts from bringing charges. It's happened before; it will happen again.