I note the name of the lake has been deleted. This is the local name of this lake. Can you clarify why it was deleted?

TBH I cant recall!? I see the changeset was closed over 12 years ago! If you feel it needs updating as it is failing validation in JOSM, work away!

The lake names added appear to be made up or added as a bit of childish fun (family or kids names?).

Please look here for reference: osm.wiki/Vandalism

Please see opengeofiction.net. It is a collaborative platform for creating fictional maps using OSM tools etc.

The name edits will be reverted.

What was the source of the lake names?

can you explain why you deleted these nodes please.

ok, that makes sense. Do you know if the dam has been drained? 2018 Bing imagery shows the wall being breached and no water in dam.I think this dam suffers from cyano bacteria algae issues and had been closed/drained. See: https://www.news24.com/SouthAfrica/News/Kruger-Park-draining-death-dam-20080415

Why was the road deleted? If it is closed, mark it as no access or closed. The road hasn't ceased to exist because it is currently closed...

Howzit,
It was a typo. Correction applied.
Ignobilis

I know the island group and confirm it is undeveloped. I have deleted the edits. Its seems this is a joke or some form of protest/statement against proposed development of the outer islands.

Why have you deleted the mapping of this forestry? This is data derived from public imagery and does NOT require permission. You have NO justification. This is vandalism.