Sting in the ear is the worst thing I've heard lately, that sucks man. Reading about that causes sympathy pain, like hearing about a deliberate paper cut.
If we're doing one-upsman stories of stinging insect retribution, here's mine.
Long ago, I was clearing our property of scrub in a medium sized excavator. There was a lot to do, and this was my weekend/evening catharsis. There was almost always alcohol.
So one friday night, I'm in the machine, minding my own business ripping scrub and WHAM, a sting. Then another, and another. At that point I bail out and start stripping my shirt off on the run. The hornets aren't letting up and are now going after my dog. We run 200 ish yards to the house, with me swatting them frantically off me and the mutt. I clear us of bugs and regroup. Get another drink, and start planning my vengeance...
TLDR, Got extra layers of clothes, goggles and gloves. Mixed up a can of diesel with a bit of gas, and grabbed a road flare. Made it to the machine, drove it back while getting dive bombed by hornets, changed the bucket for a grader ( no drain holes). Dump volatile mix into said bucket, and button the machine up tight. Roll up to ground hornet nest with pissed off bugs pinging off the cab windows, and dump 5 gallons of nasty on their stupid nest. Haul ass away. Then strike the flare and pitch that sumbitch... Muted "woosh", and no more ground hornets.
No kill like overkill.