Gave up zero beating years ago. Would suggest the same to all. After a CQ everyone zero beat to me and I could not copy anyone. Now I offset my xmit freq abt 30-100 Hz and seem to get through to CQers easily.
Isn't this more of a sign that your transceiver's indicated and actual frequencies are out of calibration than anything else?
No. What KI6LZ is talking about, is a dozen people clicking on a packet spot. 11 go to the "exact right frequency of the spot" and end up clobbering each other in a big mess. One goes offset by a hundred Hz or so and stands out from everyone else and gets the QSO easy.
I feel that in addition to packet spots, another factor making things worse is the built in rig tools that make it easy to visually zero beat a station within a few Hz.
I myself would advocate random offsets of up to a few hundred Hz as most effective.