Yes, they do.
Not automatically, but they can meet during the course of the UEFA Champions League competition, if they get drawn against each other.
Because the people that are playing needs silence to concentrate on playing.
It's Raimond van der Gouw. He has won the Premiership, Champions League (unused sub) and FA Cup (unused sub) with Manchester United, has never played in the Uefa Cup (Manchester United were always in the Champions League during his time at there, and he never experienced European football elsewhere), and was relegated with West Ham United (despite not playing a game for them).
During the 2006-07 season, Manchester United played 11 friendlies, 38 Premier League games, 8 FA Cup matches (including two replays), 2 League Cup games, and 12 Champions League games - a total of 71 games.
Chelsea have never auctually won the Eruopean Champions League, however this year 2012 they have reached the finals just like they did 2008 when they lost against Manchester United during the penalty shoot out.
real Madrid from 1955 to 1960. benfica 1961 and 1962. internationale 1963 and 1964 ajax 1970 to 1973 bayern munich 1974 to 1976 Liverpool fc has won the champions league twice in a row as well, during the years 1977 and 1978 Nottingham forest under brian clough has won the champions league twice in a row during the years 1979 and 1980.
They do. Sometimes (just sometimes though) it gets in the way of the action.
The Vuvuzela. People were playing them loudly during matches.
It is possible to get injured in any situation, during matches, friendlies, practice matches, training or even at home.