Is this really an on-going concern? or mostly just speculative curiosity?
First, Philip's interpretation is correct, that Wizards has the right to publish that information, whenever they want. And yes, TOs also may publish that info any time after their event. During the event isn't as clear.
If someone is interested in doing live coverage of an event, they should work with the TO (who can also work with Wizards, probably via a WPN rep) to ensure they comply with any and all rules, respect privacy, don't get in the way, and don't compromise the integrity of the event.
StarCityGames.com provides live coverage of their Opens and Invitationals, which fall into that “non-Wizards” category of events; I'm quite certain that the folks at StarCity carefully researched all the ramifications and requirements for doing so, and I'm also quite certain that they worked with Wizards to ensure it was done correctly, wasn't violating that paragraph, etc.
If someone tweets or otherwise publicly posts something, they run the risk of violating others' privacy. In today's environment, that's a very murky area; individual privacy is quite different than it was just 10-15 years ago, before the explosion of mobile, connected devices and social media. However, that's not our concern, neither as judges nor TOs. If Public Pete posts info about Suspicious Sam without Sam's consent, they get to resolve that - not us.
If Tommy the Teammate posts info about an opponent of Timmy (another Teammate), and Timmy looks at that during the match, it's a clear violation of Outside Assistance - and perhaps knowingly, to gain advantage. I bet we can all figure out what happens next. :)
“What is the proper penalty for a coverage man…” There are no infractions in the IPG that cover this.
Mostly, I think we've veered way off the tracks, going from mild curiosity to wild speculation.
d:^D