Sacrilege
“The same thing bothers me.
It also bothers me when my “super masmidim” family members do it at family sheva brachos and at the shabbos table.
Learning is learning and mentshlachkeit is mentshlachkeit.”
If nobody is speaking theres no problem if they feel like taking out a sefer and learning as opposed to shmoozing and making small talk. Unless you are referring to while someone is speaking, then yes it is wrong and is arrogant and shows a clear lack of respect or a disdain for the speaker.