I've worked out front and in back. I found it to be way harder in the back. Yet, generally it seemed servers figured they deserved all the extra $ they'd make and that they were somehow superior to the kitchen plebs. I hated almost the entire FoH.
To be fair, though, there is often also an annoying pecking order in the kitchen, where anyone who cooked would then look down on the poor dishwashers, who were often the nicest staff in my experience. No justice in the world it seems.
I'm all for tips being shared equally amongst all the staff or, better, fair wages being paid and a no-tipping policy.