Had them been pro looking and on the job, I would have kept my distance, shy to approach 'lah'. Because "pro", meaning "professionals" are people who would be working for a magazine, newspaper or a some media company. You can tell by the rest of the equipment they have and probably an assistant or two which would be around. I can't just walk near them and say "Hi", well at least I wouldn't.
Its because these guys don't look pro, just like me thats why I approach them trying to be friendly. So, I wasn't looking down on them! I thought they were birds of the same feather that would flock together.