Topband: ARRL 160 and zero beat

[VE2TZT]

I must admit that I have given up understanding how and why so many are 
calling so far from the zero beat.

During this 160 ARRL and more generally all CW contests, at several 
instances I answered to the guy two times without knowing exactly which one 
was for me and which one for my running neighbour...

I guess that except for those forgetting to switch off the RIT, some 
operators never had other filters than SSB filters in their radio and do not 
realize what we can hear at the other side through a 400 Hz or 250 Hz 
filter.

Gilles VA2EW