In some states they will get a ticket for doing that.
I have never seen someone get, heard of someone who has seen someone get, or heard of someone who has gotten, a ticket for failure to yield right of way for camping out in the fast lane at too slow a speed.
I’ve often said if I were cop for a day, I would do nothing but write tickets for that and for burned out brake lights. One gets you a warning, two gets you a ticket.