No, is a 2% annoying and absurd, that creates the culture of the evil. lol
Last season I had almost all the season the league rival supporting against me, and I won almost all matches, then I decided do the same just to touch the banana and the 1st match I went to support against him in the whole season he lost xD
So, really? have a practical sense? and for a 2% that we don't know in what affect? really I see a practical sense in have others, involved in the supporting, but not in this essence and idea.