Not everybody wants to be accosted in an elevator, whether it’s an invitation to a date or a debate.
For context, see Rebecca Watson’s “The Privilege Delusion.”
Common sense says, Don’t make people feel uncomfortable. And if you’re a confident sort, don’t belittle those who are nervous. Your landscape is not their landscape. Richard Dawkins has probably never been raped in an elevator. Or a stairwell. Or a washroom. Or a car. Or at work. Or at home. Or in the street. Or behind a church, or in a church. And from his security, he can be sarcastic about people who don’t want to be propositioned in a moving steel box in the dead of night.