I've have been to DL on nights when fireworks are cancelled, and I know that the people around me aren't happy about the show being cancelled.
Doesn't it seem wrong to complain about fireworks being cancelled since high winds aren't something that Disney has no control of? I mean, I know you've paid a lot to be there but they make it clear that everything is subject to change without notice.
As a frequent visitor and an AP, fireworks being cancelled isn't a big deal which is a case for locals.
Sometimes i'll strike up a conversation with someone who is from out of town and is excited for the fireworks and happens after they announce the possibility. When this happens, they panic. I assure them that the chances of the show being cancelled at that point was 50/50.
I don't see a lot of angry people though in mid-show cancellation situations since they did see some fireworks but I still feel anger in the guests.