Glad to see you've been exonerated (read the tail-end of the thread in "another place")... but this reminds me of something that was discussed recently regarding the eastern edge of the London City zone: much of the airspace we are talking about was designed before chaps like us had accurate GPS aboard our aircraft, and so people tended to give a wider berth to the various CTR/CTAs.
Now that we have GPS, we can technically fly within 100 yards of the edge of zone in theory! The view the controller has via his radar may - for reasons mentioned above - not be as accurate. There are some standard approaches and departures (at LCY and elsewhere) that take the IFR traffic temporarily slightly outside of CAS, so this can be more of an issue than in the past...
Also, a busy / stressed controller might be alerted by a seemingly close target, look away to other traffic, then look back just after one of us has just skirted around the edge of some bit of his zone, and conclude wrongly that you have flown the straight line between where he last saw you and where you are now, clipping his zone. I am guessing that the guy had had a previous VFR flight infringe his zone and cause him a problem, but not on his frequency at the time (that's why us local pilots avoid calling Luton
- only joking...) and so he might have decided to take it out on the next bloke who came close and whom he had radio contact with! Just a guess...
Anyway, my point is that it wouldn't hurt us to routinely leave a wide berth of say min 3~5NM when skirting someone's zone... it's not really that inconvenient in terms of time or money, and it means that a small error on my part or on the part of the controller is not going to cause a lot of bother and hot air. The alternative might be a decision to slightly enlarge the CAS.. which would be a great shame..!
Just my two-cents worth...!
Andy
