I, for one, know that there is a thing called "Google" that I use for solving mysteries like these. Plus, applied in a general context, do you expect Twitter now to contact every email address posted on the platform to check back with the owner on the legality of disclosing the email address to the public?

Obviously you can't police the world, but if there is a system that prevents abuse that they have the ability to use, I see no reason not to use it.

Also, this has nothing to do with legality, only TOS/privacy policy violations that you agree to when you sign up.

The difference between me and the complainant:

I don't work for a massive news organization. NBCUniversal owns a broadcast network. Broadcast spectrum is held in public trust, with monopolies on access to that spectrum granted to a limited number of parties.

To my mind, this makes their executives publicly accountable. Y'want your fat media exec salary? This is a cost of doing business.

And let's be clear: this guy's work email was shared. Not his phone number, not his home address.