One of these blokes has almost completed full affiliation reassignment from Eagle to Seagull over the last 20 years and wears blue and white scarf to matches. I think he looks out for Palace results but that is about it.
This is true, I know a couple of dads who supported Palace growing up but have moved to the coast and have Seagull supporting kids, and indeed take them to the AMEX and cheer when Albion score.