So I'm surprised you think embargo-busting is likely to leave that relationship unaffected. Embargoes help PR and the media manage the news timetable better.
PROs can ensure media get the message simultaneously, and journalists can plan at least some stories ahead.
If a publication wants to throw trust out of the window, it's likely simply to end up 'out of the loop' altogether - without any forewarning of a story and less well placed than rivals to cover it. Properly used, embargoes have mutual benefits for both sides.
Simon Montague, director of communications, Eurostar