to the overused and predictable "shocked" and "horrified" aibus. may i suggest that instead of being horrified over a friends' parenting style you are "aghast" or indeed "un-nerved".
that instead of being shocked at a family member having their birthday party on a week day that you are "scandalised" or "double whammied" or "stupified".
lets change it up a little ....
the more far fetched alternatives the better and bonus points for teaming new word with a popular aibu topic!