"Booing the national anthem, racism and jumping on the pitch has to stop. It's going to get us in a lot of trouble," said Becks.
He made a direct appeal to the England fans, saying: "Just get behind the team and do it in a nice way, because we deserve it.
"We don't want to be eliminated from the competition."
Like the fans, Becks will be cheering on his team-mates from the sidelines.
He will not be playing in the match after injuring his hand in England's game against South Africa last month.
He will also miss England's next Euro 2004 qualifier - against Slovakia in Middlesbrough on 11 June - because of a suspension.