Girdler,
Yes, one can on occassion (I stress on rare occassion) be completely perplexed by the decisions made in the Blackbushe circuit, some of the circuits being somewhat polygonal in shape and large to boot. I have also seen the odd aircraft apparently transiting the zone well below 2000 on the QNH!! Maybe they had information, but I still don't understand the need for it.
If it is the case, then how is it that SA is lost in the latter case? Is in part due to something like relience on GPS CDI style displays or something?
and I consider myself extremely tollerant and understand!!