It is very frustrating though when the pilot of the aircraft involved in a VCA does not reply to on air queries.
Worse - those who in response switch off their transponder. Watch 'em with primary and nail those monkeys.
CTA boundaries are set way too large
Most CTR and much CTA was revised a number of years ago, and with respect to CTR now generally they are where the limits of nav tolerance splays are for the various instrument approaches and to contain holding patterns within CTA.
In short, if you fly on the edge of a CTR or its associated CTA steps - or at the LL of a step - you may not be very far away from something within, so be very careful with your nav and altitude
