what would you do?

I have to make a decision that could have a big impact on a fellow pilot
and I would appreciate knowing what you would do in my situation - Here
are the basic facts:
Today I, along with a pilot passenger (witness) went to a fly-in - lots
of planes arriving in short time frame.
Active runway was 14, lh downwind, circuit height 3000 ft.
We called 5 miles out (procedure) and received a response from another
pilot "Joining 17 in 2 minutes".
I responded, "are you arriving xxx airport - there is no 17"
Response - "sorry I meant 35".
I reply, there is no 35 - the runways are 14 and 32. 14 is active,
downwind is lh, circuit is 3000 ft.
Response - circling over 35 losing altitude.
Me - I am approaching threshold of 32 at 3000ft to join downwind left
14. There is no 35 and you should not be descending over the runway.
Response - I am at 5500 descending for 35.
Me - I repeat this airport is 14 and 32 - circuit height is 3000 ft. We
are about to cross midfield to join downwind left 14.
Response - Sorry I meant 32 - I am on downwind left 32.
(32 if it was active - is downwind right)
Me - You are on head on collision course with me- I am in immediate
emergency descent and crossing to midfield (no choice - mountains in
other direction)
Response - Well - I'm trying to land here! Huh?
Me - XXX Radio - are you guys listening to this? I could really use your
help here right now (I admit - I got VERY rattled)
XXX Radio - Errr aircraft xxx active is downwind left 14.
So I land.
And then this plane comes in and bounces nose wheel to mains - 4 or 5
times.
So I'm out of the plane and I meet a friend who arrived before me. And
that was when I found out that our radio calls had been broadcast via
loudspeakers to over 1000 spectators.
And my friend said, "I am really embarrassed about this, because I have
been trying to help this pilot (who has a PPL and over 100 hours) but
she is totally clueless.
So the pilot now taxis next to my friends aircraft , taxis into the
grass/soft dirt - gets stuck trying to turn, applys FULL power and
sprays the side of my friends aircraft with dirt & stones - and keeps
doing it - because she is so clueless she doesn't know what she is doing.
Moving forward - I watched her depart.
Radio at taxiway - Aircraft calling on final - which airport are you
landing at - I kid you not.
Aircraft on final - 14 XXX
He lands.
Another aircraft calls final 14 xxx
Response - Aircraft on final - which airport are you landing at?
Aircraft on final - 14 XXX
And yet another aircraft calls final.
"Listen - I'm waiting to take off here"
He lands.
She has about 8 aircraft behind her.
Now she does her runup.
Her call - XXX taking off. (No runway - just taking off).
Of the approx 500 aircraft that took off here today, this was the ONLY
one that didn't backtrack.
With nosewheel up way to soon for density altitude she took off, stall
horn wailing as she skimmed the trees and departed for home.
Would you report her - or would you forget it?
I'm having a hard time thinking of reporting her,
I'll have a harder time if I do nothing and she crashes next week.
What would you do?
Thanks
Tony

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Tony Roberts
PP-ASEL
VFR OTT
Night
Almost Instrument
Cessna 172H C-GICE