None of these reactions may be conscious on the part of other users, but all of them increase the channel temperature. Avoid highlighting and repetition. Avoid emotive speech. Slang pertaining to sex and sexual orientation, excretion and religious oaths is rarely used to discuss the applicability of those topics to free software. It doesn't matter whether the language is socially acceptable or unacceptable.
Emotive speech raises the channel temperature.
Avoid advocacy debates. These discussions are often religious, may not involve significant new ideas and can raise the channel temperature quite a bit. Certain advocacy discussions, such as those revolving around actual religion or politics, are almost guaranteed to raise the channel temperature to levels that make other conversation difficult. Take critiques to private message. Criticizing someone's behavior on channel holds them up to public scrutiny in a negative way.