As others have said, it's somewhat gray.
As a GM, I tend to fire a warning or two before I act, when things like disrupting chatter are getting out of hand. A lot of times, folks don't even realize they're practically making the game impossible to play. I've even been on the disruptive side of things and felt bad about it, once pointed out. There have even been a couple of nights (over 35 years of gaming) where we've decided the whole group is just too fried to actually play and called the game in favor of cards or just shooting the breeze.
All that said, it's not inherently a dick move. One table rule I've had for at least 25 years is that, if a player interrupts me reading the "boxed text" (whether or not I'm literally reading from a box), it's an in-character indication that they're not paying attention to their surroundings. If I start describing a dragon's lair with the treasure and you say, "I run over and grab the sword," then you were so tunnel-visioned that you mentally blocked out the dragon's existence. The rule started, not as a dick move, but because I had a player who was forever interrupting capstone encounter descriptions, even after being told, "You might want to let me finish." The other players were as sick of it as I was, so the rule was born. Since that time, I've always had at least one player carry over from group to group, so it's stayed in place because the continuity player brings it up.
Without context, that could sound like a dick move. With context, not so much (IMO).