I would venture that in this particular case it's not sytemic of BT's, more a personal thing. as he said in the article linked to previously:
"There was a time in my life when I was extremely pious and moralistic. I wouldn't wear glasses on the street so I couldn't see billboards of women. I didn't talk or touch a woman for four or five years till I was married. I didn't touch drugs.
"I was living this life in environments where all those things were readily available and being pushed on me and I was just really focused on what I thought was important.
"But eventually I did become affected by the things around me. It's a slippery slope. You let down that wall and say, 'I don't want to not be able to go out to dinner with my friends and family; I don't want to have to go straight home after the show or be reading my Torah on the way to the show.' I want to take part in the world."
My point being - no one, FFB or BT, can be part of a fan culture, where literally every possible vice is being thrown at you, and not be influenced. This is true not only of yidden,