We'll get the "... plane won't leave without you, so why bother, I've never understood it" arguments.
We'll get the "... if I want locker space, I'll get to the gate early" arguments.
We'll get the "... you should never, ever, cut into a boarding line" arguments.
We'll get the "... pax with children should always have priority" arguments.
The solution is a well implemented priority boarding system. Then it doesn't matter what others think - you can simply choose to use it or not.
But "row 3"? Of what airline, on what plane is that? (is it Virgin? - it's not Qantas, I know). Qantas let high status pax select the first rows.