Wikipedia's bio of John Roberts indicated that he went to an all-male boarding school, and was on the wrestling team.
Manhattan Offender, which appears to be a small personal blog, points this out, along with the fact that he took French and sang in the choir, and jokes that he might be gay. At least it is my conjecture that in this context, it was intended as an ironic remark, and that readers of a Manhattan gossip blog will perceive it as such.
Wonkette cites the Manhattan Offender joke and adds that Roberts must be a flame-thrower because he edited the school paper, The Torch. To add to the joke, she cited a NY Times piece entitled 'Court Nominee's Life Is Rooted in Faith and Respect for Law' for the bit that Roberts had played 'Peppermint Patty' in a high school play.
Ann Althouse a law professor, reads Wonkette's piece, notes that she had come to the same 'conclusion' that Wonkette did, and therefore she concludes that the NY Times had intentionally placed the bits about Peppermint Patty (and a photo of Roberts in a 'all-male wedding photograph' (as in photo of the groomsmen)) to plant the notion that Roberts was closeted.
Charmaine Yoest, an author and policy consultant, cites Manhattan Offender, Wonkette and Althouse's posts for the proposition that the 'left' has begun a whisper campaign against Roberts. She suggests that the left are homophobic.
Powerline , a high-profile conservative blog, in a piece entitled 'They Were Already Beneath Contempt,' cites Charmain Yost for the proposition that the 'Democrats' are hinting that Roberts is gay. He also adds that the Democrats were in favor of slavery.
Gordon Allport, in the 'The Psychology of Rumor' describes the manner in which rumors are transmitted (I'm using Malcolm Gladwell's summary of Allport from his book 'The Tipping Point'): The story is leveled - details essential for understanding (such as the fact that Wonkette is a humorist) are removed. The story is sharpened - the source of the 'facts' are no longer Wikipedia and the NY Times but 'the left' and 'Democrats.' The story is assimilated - the story is changed to make sense to those spreading the rumor. The Democrats are spreading a scandolous rumor about the innocent nominee for their own purposes.
That story will more sense then that someone would make a not particularly funny joke about Roberts being on the wrestling team, at least to those who will link to the Powerline without checking the links back to Manhattan Offender and Wonkette.