Well, I'm Danish and Brøndby's fans are by far the loudest in the country. Sometimes away sections of AGF and FCK can be okay. And I totally agree with you; It does not take many people to create a very, very good atmosphere. In the videos of Brøndby, it's actually only a few hundred of people are really crazy. The rest just turns up, and follow the "leaders". The situation is the same for all other Danish clubs. Actually, it's quite clear how important a few people can be. For some of the smaller Danish clubs, their ability to create a noisy stadium varies a lot from season to season. The club Midtjylland, Man Utd played them in Europe League, has recently created all right noise at home. Normally, they have been very quiet - also when they were succesful. A group of 10 dedicated young men seems to be the only difference; they go out, sing their hearts out, and they try to encourage the people around them... And it works. If 2 block at Emirates were dedicated to the most dedicated loud fans, and they had 5-10 people to organise the singing, it would definitely get most of the North Bank rocking.