The sad thing about classic rock 'n' roll bands like The Who is that they haven't gotten any younger. That was the case for the band's frontman, Roger Daltrey, who has had multiple procedures on his throat, and he has even had to postpone a tour due to a throat infection last December, as reported by TMZ.

So if you plan on attending one of the band's concerts, be prepared to abide by its rules.

People in the crowd for last Wednesday's Long Island show said the band announced ahead of time that smoking would not be allowed during the concert. That was in large part due to Daltrey's condition, which was very sensitive to smoke of any kind.

But Billboard reports that the rule was quickly broken. Three songs into the set, the Hall of Fame singer had to stop the show because someone was smoking a joint. The effect on Daltrey's voice was very noticeable as well. It was said to go from "crystal clear and potent" to "something rougher and more limited."

Daltrey stopped the concert to address the fan directly who was smoking.

"The show will be over," Daltrey told the fan in the audience. "It's your choice, I can't do anything about it. I'm doing my best."

There was even a crowd response to the toking fan.

"Eat it," they shouted at the stoner, whose smoke was causing the singer's voice to die out and the songs to become less engaging.

Even bandmate Pete Townshend joined in with the crowd and said over his microphone, "Eat it up your f**king a**e," later implying that's the quick way to do it.

The situation eventually resolved itself, and the concert continued. But fans of the group now know that smoking anything at a The Who concert can possibly stop the music -- for health reasons.