See this just proves, they might have said, that the Liberal Democrats don't enjoy support from 100% of voters.
What we really want to see, they might have said, is party leaders speaking only to tame hand-picked audiences, like the other two do all the time.
The fact that there is any surprise at a party leader receiving a mixture of boos and applause just shows how rarely they face real audiences. Kudos to Nick for having the gumption. I wonder if either of the other party leaders would dare.
And it was all applause at the end.