Yes.<p>Thinking that you have &quot;politeness capital&quot; that you can &quot;spend down&quot; by being occasionally impolite is very wrong.<p>I&#x27;ve run into people that I refuse to work with, ranging from choosing not to do projects with them to trying really, really hard not to ever have contact with them again, by any means.<p>I have probably <i>been</i> a guy that people avoided. It sucked. My advice is that, in the long game of doing stuff with other people, being professional and polite is worth it.