4H&H-
As someone else said- it's a matter of good dog ownership to fix their Own fences and leave information!
You did the best you could with what you had at the time. I wouldn't let Anyone else beat you down about it, period. They "Oh yeah, we knew." about the hole in the fence is enough for me to agree that it's not on your head-
Had your kid left a door open, or god knows what else- then Yes, you may feel guilty. However, nothing of the previous happened, so no guilty party for you hon. Sorry- EVA is dead on!