As stated, it is done with tower's approval. I fly downwind at 500' agl, approach along the normal approach path down to 200' agl, fly along above the runway, climb to 500' agl, next approach I fly down to 50' agl, again over the runway and next time I land. What is abnormal in that. Our Day VFR Syllabus requires that I teach precautionary search and landing. The Day VFR Syllabus states, amongst other things:
"Circuit conducted at 500 feet or 100 feet below cloud.
Landing strip is flown over at 100 feet and to the right or directly over the landing strip depending on forward visibility from the aircraft type and surface conditions assessed.
Dummy approach is completed rechecking surface and drift.
Final circuit is completed and aeroplane is landed according to prevailing conditions with short landing if applicable."
I suppose different lands have different legal systems. Our basic law says "you can land anywhere you like, if you don't crash - it was legal, if you crash - it was not. There is a whole CAAP on how to assess a landing field.