Nothing wrong with carryons--only with the people that abuse them. Having only carryon has allowed me to connect on short connection (i.e. non legal connection where baggage would not have been able to be transferred) flights saving me hours of waiting in airports.
Even though some airlines have pretty good priority baggage service for their Elite members (e.g. AC), I get to fly on many airlines that do not recognize my status and can take up to half to 3/4 of an hour to spit out my luggage. Even though bags are not lost, it takes some of the advantage out of flying between some centres--you might as well drive with the waits on both ends. I prefer carryon but keep it reasonable and "legal".
I cannot remember inconveniencing or knocking anyone with my carryon. There is always room left in the overhead bins of the business class cabins I travel in (even when they are completely booked).
A bit more common sense combined with a little enforcement of the most flagrant violators would solve most of our problems with carryon.
[This message has been edited by BlondeBomber (edited 06-20-1999).]