A Tourney without Vacations?

Would it be possible to have a tournament with no vacation time allowed?  I like the concept of vacation time, but some of these tournaments take forever when the first round is 90% complete but everyone is being held up by one or two players on vacation. 

I'm not saying we should get rid of vacation time during tournaments, but it would be nice for someone to host a tournament without vacations once in awhile.  Just a thought.