Even Spidey needs a week off
People going to a cosplay convention usually put their costumes on right before heading to the venue. However, this guy was probably a bit too excited and couldn’t wait to land before sporting the classic Spider-Man costume. Seriously, though, who does this sort of thing? We’re not annoyed like the OP, we’re just curious.
But there’s a huge advantage of wearing a Spider-Man mask (or any mask for that matter) during flights. You can sleep with your mouth hanging open and nobody will be the wiser. Remember that sleeping man whose mouth was agape from earlier? That wouldn’t have happened if he wore a mask.