Ah, another wave thread.
The Jeep wave tradition arose not from an externally directed decree that Jeep owners should wave to one another. It rose from Jeep owners waving to one another as a sign of recognition, friendliness and kinship.
Food for thought:
1.) You have to know about the "Jeep wave" to recognize one from some person just motioning in your direction. Not everyone knows about the "Jeep wave". The wave is unofficial, it is more of a club which you join by word of mouth.
2.) You have to want to participate in the wave. Some people know about it, but don't care about being in the "wave club". Some people just have bad days and don't feel all chipper enough to wave.
3.) You have to see a wave to be able to return the wave.
4.) Sometimes there are much more important things to be concerned with on the road than waving at other people who are driving Jeeps.
So, wave to show friendliness and Jeep kinship. If the other driver recognizes your wave and returns it then you just met someone in the "club". If you don't get a wave in return don't get your panties in a bunch.
Just enjoy your Jeep.