Anal sex flamewar
From Wiki Gonzalez
The anal sex flamewar occurred in the Primer Lounge on November 23, 2004.
The Lounge was experiencing a fairly unremarkable discussion of pornography, when rLr suggested that double penetration is for latently homosexual men. Soon after, Jeter's #1 Fan also questioned the purpose of heterosexual anal sex, suggesting that degradation of women might be its primary function, and Dan Werr took immediate umbrage. The tone of the discussion degraded from that point.
Pursuant to this discussion, several BTF users changed their usernames to include the phrase "latently homosexual", and parodies thereof, some of which persisted into the following month.