[CQ-Contest] The dupes?

[Yuri VE3DZ]

Usually, when I operate from a DX location (~4500...6000 Q's in one weekend) 
I end up with about 150...250 dupes.
Imagine, it's like 2 (or even more!) HOURS you are operating for nothing! 
It's just wasted time. And others that you did not work because of that. I 
log all the dupes, because that's the best you can do for yourself with 
existing LOG checking system.
There are dupes and dupes. But sometimes I feel the same way as Steve, K0SR. 
Some dudes don't bother with any type of dupe checking (or even logging?) 
and call you 3,4, 5 or even more times during the Contest.
That's frustrating...

Yuri  VE3DZ