I clearly should have ben more exact, but i naively thought that there is no reason to say that there are exceptions in any group you describe, since we all are aware of that.

There are even people who concider Taika to be brilliant and inovative director ...
I find his work to be often childish, his humor to be disruptive, often forced and in situations where it is quite inapropriate ... so im quite affraid of his Star Wars movie. :-/
But that was my point ... there are people who dislike that way of playing.
And while there are people who politely suffer in silence ... there are also those, who will spam every single social media they have acess to with their opinions.

Not gettind too deep in this ...
In short many people who play extremely serious characters just decided to "rather play safe" and keep their silines down ... wich (lets be honest for a seond) in
some cases actualy is the best approach they can choose ...
Since its often quite hard to play silly character in a way that is not anoying ... wich is (just by the way) source of my universal hatred to Bards.
//Edit:
whatever works with a group. As long as all players are on board, do what you want.
Also this ...
Let me quote one wise Elven Druid: "Chaos is good, in small doses it help keep the ballance."
Fishmalk (at least as i use that word) is not about "small doses" here and there ...
Fishmalk is constant, permanent and undending borbandment of bullshit and disturbting any play (i wanted to write plan, but i made a typo ... and it seemed to fit even better

) you even try to make, or execute ... no matter how hard you try to explain to that person that they should slow down a little.

Fishmalk ... is
> this <.
And that is the point.

Occasional silly joke here and there dont offend anyone, as it was said, even serious stuff as GoT had jokes ...
Problem starts when you overstepp that amount ...
Or if you are unsure wich amount would be apropriate ...
Or, and that is in my honest opinion the most common case, if you have different idea of "apropriate amount" than others.