Science isn't emotion, Science is empirical evidence collect through a lot of hard work over time by many different Scientists worldwide.
When scientists communicate with each other, sometimes it's without any emotional connection, not so much a "how was your day?" but more specific communications in regards to whatever details or criteria is their field of research. (They can of course have the niceties too, but that's more about respect for people in their field.)
If a scientist falls to some emotional retort, it implies they'd be high strung and difficult to work with, it might even suggest they wouldn't be able to concentrate on fairly weighing the facts and viewing their research with an unbiased perspective (They could be prone to being deluded).
So it's possible that a few might throw the occasional derogative to see if a person is thrown off balance and responds purely out of emotion rather than acting guarded with intellect.
This is also the reason why you'll see the term "Troll" stated at people that act erratic and highly emotional, it especially gets used when the person called troll writes posts that are all about their feelings, their hurt and why they aren't happy about how they've been singled out. The reason for this of course is the subject that was initially being discussed wasn't actually the important thing but the persons own need to be Right and acknowledged for something by their peers, when it doesn't go to plan it becomes an emotional response, rather than a re-examining of what their perspective actually was. (It's very difficult for anyone to admit to themselves when they are wrong, but sometimes you have to do it, after all... Nobody is infallible.)