I think my younger self envisioned science as this pure pursuit of knowledge and truth, but after I worked in a big lab full-time as a post-bac for a year, I realized the obvious: science involves people. People will be subjective and petty whether they're in congress or a lab. I'm not trying to sound overly cynical, the majority of people I've met in science are good, hard-working people. But, I've definitely seen papers get pushed into publication in big-name journals because the PI happened to be friends with the editor. And I've definitely heard some petty smack talking. The scientific community that studies a specific phenomenon is usually pretty small. If you start talking smack about another person, it'll get back to them. As far as that goes, if you disagree with someone's work, disprove it with experiments, don't make it personal.