I do not agree. People that can behave as professionals do not create that tension. There is not one drop of "sexual tension" in my office because being professionals we are capable of keeping our personal and work lives separate.
I'm a big believer that people that work together shouldn't even be able to date as it creates a work atmosphere that isn't professional. Although conference attendees aren't necessarily coworkers, they should keep their personal life and professional life segregated and anyone that isn't capable of that shouldn't be attending the conference.
The behavior that's been described at these conferences would get people fired and black balled in my profession.