A transmission at FAVV looks similar to this:
Acft: Vereeniging ABC, inbound from the south-west, 5nm out, requesting joining and landing.
Tower: ABC you may join on a right-hand downwing for runway 03. Report downwind established.
Acft: Join and report right hand downwind 03.
Acft: Vereeniging Tower, ABC, on the downwind for 03.
Tower: Report Finals, you are number 2.
Acft: Report finals, number 2, ABC.
Acft: Tower, ABC, Finals, 03.
Tower: ABC, land at your own discretion, surface wind calm.
Now if it happens that the pilot wasn't paying attention, and she "advises" another acft to do exactly the opposite as seen above, at the same time, it is possible for them to be in serious trouble.
I merely saying what I observed on Saturday. And if I was in a cub, and just airborne with a Cessna 402 flying over me at 20 feet above me. Well I don't think it's a very comfortable situation. (That was the actual scenario, although the twin could've been a chieftan)