Jimmy Kimmel recently did a segment on cosplayers at San Diego Comic-Con, and it’s hard to see it as anything but disrespectful. Take a look for yourself (warning: this is a bit NSFW).
In the video, Kimmel has his crew stop cosplayers at SDCC and ask “Have you ever had sex in your costume?” Then, just before the cosplayer answers, the audience has to shout whether they think the response will be ‘yes’ or ‘no’. Then they reveal whether the cosplayer is a loser with no sex life or a statistical anomaly, as the video is suggesting. In only two cases did the audience think they may have had sex in their costume.
It seems like the message you’re supposed to take away from this video is that it would be ludicrous for nerds to have had sex (Kimmel says “do we even have to ask” regarding the last cosplayer, and “it was about an hour ago, he was alone” regarding The Joker), and if they have then it couldn't have been in any "normal" way. The video also seems to be equating a cosplayer never having had sex in their costume with never having had sex at all.
Though it is still not particularly surprising to see cosplaying and attending conventions portrayed so negatively in the media, it is still very disappointing. It seems like we should have reached a point where making fun of people for partaking in entirely harmless hobbies, for finding activities that bring them joy and help build communities, would be a thing of the past.