Hoot if you're interested in Led Zep

There is a debate going on in the office of BBC Radio 4's PM programme. Is the Led Zeppelin reunion gig news or not? "We're toying with the idea of doing something on the Led Zeppelin gig," reveals presenter Eddie Mair in his daily email to listeners. "There was an animated discussion in our 11am meeting about whether many of our listeners could give a hoot. If you're gagging to hear from them, you could always send us an email. But don't put yourself out." He later adds that "hoot" was "not the term used". What could it possibly have been?