I don't like anyone shouting out anything negative, whoever it is. Be nice people. It brings an aggressive, nasty tone - I hate the booing for judges' comments too. It also shows a lack of respect for other peoples' opinions - mob rules doesn't work for me.
Having said that, can't see the need to single out the Cliftons AGAIN. Karen has been out of the show for weeks, Jo and Kevin have clearly understood they can irritate people and are practically invisible and keeping a low profile as far as I can see. Jo is constantly trying to 'calm' Ore down and put things in a positive way. As many have said, Kevin is completely different with Louise than with Kellie last year. I really disliked their partnership last year but find him totally inoffensive this year.
If there's any unprofessional behaviour going on, it's encouraged by the Producers and this certainly wasn't the only incident.