I used to wave to all jeeps. Then like most, was only getting waves back some of the time from jk owners. So I do what others here say and that’s wave to all TJs and built JKs. Stock JKs JLs only if they wave first.
Oh and it’s the two finger and thumb on 12:00 steering wheel wave from me
Oh and it’s the two finger and thumb on 12:00 steering wheel wave from me