Like most things, it depends. Think of the web devs of yore with MacBook Pros and Angular and React and Vim stickers stuck aside their glowing Apple logo (no longer a thing unfortunately). IMO having a pelican pin would be more of the same - advertising you are a developer of some kind. An attempt to bridge the gap to a stranger who might be into the same thing. The tech changes, the desire to signal things doesn't. The usual Exceptions(tm) apply of course.