You should treat everyone that you work with (and everyone that you interact with in general in the other parts of your life) with kindness, respect and the benefit of the doubt. Even people who are rude to you. Period. You don’t need to go about this with fakery and stealth, like our beloved Comrade Physioproffe confesses to do:
Example: I like to eat a few hard candies every day after lunch, but I don’t want to keep them in my office, because then I pound them instead of just eating a few. So I keep a dish in our department business office stocked with candies that I buy, and every day after lunch, I pop into the office to grab a few. While I am in there, I say hello to the admins, and make small talk for a few minutes.
So why should you bother? Because it is the right thing to do. Not because your job might be made easier (and for the record I don’t think this is what CE really meant), not because you think you should, but because it is the right thing to do. I don’t know how to explain it any more simply than that.
I have a special ire for people who think that because of their profession or position they are ‘above’ people in other professions or positions and they act accordingly. The kind woman who empties the trash can in my office works every bit as hard as I do- and I’ve had every advantage. The compliance officer, who I often spar with over the rules, has a job that is amazingly difficult in ways totally different from my job, and a totally unenviable one at that. What we all have in common is that we are all trying to do our best at our jobs and for the competing demands of our various lives.