Has anyone noticed that people tend to dress casual for nice events more?.....?

I recently wen't to my sons high school graduation and noticed that very few, if any, parents or guests dressed nicely for the ceremony. They were in flip flops, summer dresses, and t-shirts. Twenty years ago if you dressed like that you would stand out like a sore thumb next to all the people who were in suits, ties, and dresses. What is happening to our culture? Arn't some events worthy of showing respect? It's like everyone thought the invitation was for the country fair, not a graduation.

Has anyone noticed that people tend to dress casual for nice events more?.....?met opera

An unfortunate sign of the times, standards are not dropping they are being blatantly ignored. Make a stand and show the people how it should be done..!!!

Has anyone noticed that people tend to dress casual for nice events more?.....?movie theatre opera theater

yes
I really dont think that dressing up nice means that your showing respect to the person..

hell just showing up should already show that you have a hell of alot of respect for the person just for being there..

some people find formal clothes uncomfortable, unbearable they feel they look better in casual clothes! its a dieing age you dont have to spiff up for events like graduations anymore as long as ur there and giving ur support that should be good enough.
I have noticed the same thing. People even wear jeans to weddings!
Things change and I don't think this is necessarily a bad thing. I hate it when people judge you because of what you're wearing which is essentially what was happening twenty years ago. Go wherever you're going and have fun. Don't worry so much about what others are wearing.
That's fine by me. Suits are stupid looking and non-functional. I don't know how we ever came to wear such absurd costumes.
The problem is that ppl don't really care any more. They think it is style to dress like that.

I wouldn't blame them as much. The teens now want their parents to be MODERN so the parents don't want to embaress their daughters and sons.
that's so they can show off their incredibly sexy bodies more
This is something I too have noticed at recent events.

We can only assume why some people do not care for changing their attire when they are invited to a special event. Either they do not have anything nice-er to wear, they are uncomfortable dressed up or they just simply do not care.

Personally, I think they just don't care.

Should every invitation state "proper attire only"?

Maybe!