If there's no limit, you can do trivial DDOS to block ANY decision of EU by corrupting one unelected person, that can only be fired by firing the whole European Commision.

That's begging for decision paralysis. The same problem liberum veto had ( http://en.wikipedia.org/wiki/Liberum_veto ).

I think it's safe to assume when we voted againist sth once, we can ignore it for next 5 or 10 years.