Kia Ora,
Well professionally I've been dealing to wasp nests for many years, possibly over 30 and yesterday and today they took their revenge BIG time...

I had two wasp nest to do, (the first for the season) the first was a breeze, straight forward 5 minute job, he was a friend, who was mowing his lawn and accidently ran the weed eater over the nest, needless to say, he got stung for his troubles, but no stings for me, the so called "professional" ( I was kitted out in protective gear)...
The next one, I was not so lucky (my positive karmic streak ran out), it was at a retirement village just by the entrance way(people had to pass by it going in and out), it was on the other side of the hedge and over a narrow creek (a metre wide) in the embankment...An elderly tenant whose home is just a few metres away had contacted the groundsman who rang me...
It was a German wasp nest, possibly a overwintering one, so it was a biggy, a wasp city with thousands of wasps...My first attempt was a dismal failure on my part, I couldn't get close enough to the nest entry point and they had already began their attack when I was around five metres from the nest, hundreds swarmed out (and excuse the 'Hymenoptera' pun) 'made a beeline straight for me, I had to fight my way through the tangle vines and thick bush and to top it all off I got stuck in the hedge trying to escape, well I can tell you they had a field day.

They got up my overall pants as I was crawling out under the hedge and stung me on both legs and inside both my upper arm areas..
I had to ask the groundsman if he could cut a hole in the hedge so I could have easier access...So this morning bright and early (around 6.45am) I returned to resume the battle (I had double protection on ie, two pair of thick overalls along with my normal gear : the bee veil, hat and thick welders gloves and gum boots-it's bloody hot doing wasp jobs)...The groundsman (who by the way was unprotected-just in shorts and t shirt) had cut a hole, so this time I managed to get in close to the nest and treat the entry point, but they still found a way to sting me on my chin...
So they had their karmic revenge and I wear the welts( arms legs and chin) to prove it, I respect them and as always have a deep sadness when I have to destroy such a beautiful structure and the little industrious builders (who are only doing their own thing "Protecting their homeland and queen/s"-we humans just happen to get in the way), but if I didn't destroy the nest, the elderly residents could have been stung, no doubt some would have allergies too...
Just thought I would share my somewhat painful experience (painful in more ways than one)
Metta Zenda