I grew up in a religious sect that believed this. I was a young earth Creationist but never bought into the 6-7,000 year age of earth variety. That seemed obviously forced to me. I didn’t think the genealogies proved much of anything because they aren’t internally consistent . I also believed in evolution, just not as a theory of origin.

That said, even as someone who could accept a 20,000 year age of earth, I never felt the need to interrupt others in public. I recognized it wasn't going to convince anyone and was just a dick move. I think most Creationists also view these people as weird assholes.