Whilst good in theory, this would add a certain amount of x factor or a wildcard into events, something which Rarebit doesn't have complete control over. Now while this may sound good, giving an element of player driven storyline, we need to remember that the story is quite rigid so anything that happens in an event would have direct consequences to the next part of the story... There could be certain types of event where this could be implemented quite well such as if players have to kill 'body guards' of the main character, that sort of thing...
Even if what Bayamo said wasn't true I would only think this was a good idea if the person(s) being given the buff had some maturity about themselves and who could act the part decently. Last thing Rarebit would want is for him to grant someone this 'buff' for them to mess up the event in some way or to disappear from the event as quick as possible to use the remaining time to go to Mara C and proclaim themselves PvP king in an attempt to gain more CQ's for their character.