So much to reply to... so little time...
What I can say is: I've never EVER had a stone rank call me "Ez" when I beat him.
I usually expect someone with a rank to have at least a bit of decency after I beat him, since they're not on this server for a day or so only.
Well I don't just expect only ranks to have "a bit of decency" and just because one person (I think one) called you "Ez" turned out to be a donator, made you single out ranks as being "cocky" sometimes when it's obviously not just them. They're the ones that donated huge amounts of money to help this server, and in return got a few perks, ability to vote game types, coloured tag and other minor details... That's it, they're no different from stone ranks and should be treated like stone ranks.
I've seen a lot of non-donors on a big variety of servers say "ez" after getting destroyed... I really don't see it being a big deal, especially when it's clearly a joke, I don't see any other explanation other than it being a joke... I don't think they're being "cocky" at all, plus I don't think that them having a rank influences their attitude in the chat.
This actually reminds me of a time when I was playing on Mineplex where I have no rank and killed someone in a game with Legend... We started talking to each other until he said "at least my mom is rich enough to buy me legend"
It was at that moment I realised I'm just arguing with a spoiled kid.
Well most of the time... xD