Only an anecdote but the one AT pilot I've talked to in the terminal was a CA that told me in quite an arrogant way that relative was the only fair thing to do. He was trying to convince me, a senior FO making the same coin as him, that I had to let him keep HIS seat. All this AFTER I said nothing about the SLI. After I walked off, he told the CA I was flying with that I was quite rude for not engaging in the debate with him. He also said a similar event happened at the bar on an overnight. Asked "What's the problem with your FO's?"
I no longer debate SLI on these boards and I won't discuss it in the terminal/bar with AT dudes. I say "Hi", I wave, and I nod my head to fellow pilots. Other than that, I let my NC speak for me.
shootr