Disneyland Paris's Parks evacuate guests by backstages : Normal or not?

Due to the huge amount of guests during Bastille Day, the Disneyland Park in Paris has evacuated his guests by the backstages of Main Street USA. That's not the first time it happens. Do you think this was necessary or not? And what about the other Disney parks in the world? I think that ruins the magic and that cast members had better not do that.

I know that Disneyland in California evacuates guests through the backstage areas. There's really nowhere else to do it.

http://www.youtube.com/watch?v=z--YqNwoQv0

Isn't that the whole point of the arcades?

happens all the time when rides go 101 or if its extremely crowded

yes it is normal and they also do the same thing at Disneyland and Walt Disney World on extremely busy days .