I do think it's important that people know these things are happening, and on one level this is clearly contributing to that, given that I'm now sharing it here. But to me there's something really underhand about springing something like this on a group of ordinary members of the public who've paid money to go to a private event for their own enjoyment, then when some of them walk out - for reasons we can't know and before they're even aware that it's a charity pitch - putting their reactions online for everyone to criticise, while implying that they're walking out because they don't want to face the issues in the real world. It's like a more obnoxious version of the pushy charity collectors who stop you in the street, if they filmed people mumbling 'sorry I'm in a rush' and posted the footage online as evidence that their cause was so distressing that no-one was prepared to face it 
Obviously that's a trivial issue compared to the things they're talking about, but I can't see it encouraging many people to donate, and given the importance of PR to an organisation like this I'm wondering if UNICEF haven't shot themselves in the foot here. Or am I completely overreacting?