But then it often seems that one of MOL's marketing strategies is to make the whole experience as unpleasant as possible, quite unnecessarily, so as to reinforce the "cheap and nasty" message - it's nasty, therefore it must be cheap.
So don't use them.
However the children with parents/superviors issue simply shouldn't be an issue. The carrier should know before hand how many are travelling in total (all pasengers with children + children) via the booking system and simply block off the required number of seats at some location in the aircraft (front, middle, rear, between the middle and the front, ot between the middle and the rear .... whatever) so they can all get seated together. Don't charge extra. Just do it automatically as long as the parents fill in the right booking info.
As for kids being supervised? The definition of seems to vary. Parents are no more consistent than carriers. I was on a flight a few days ago where a small girl completely ignored by her mother and father was clambering about and moving up and down the aisle. On another occasion I woke up in a window seat to discover that parents in the middle block of four had moved their kids into the seats next to me to make more space for themselves.