She is not that clever to be honest.

It's sure that a huge crowd of fans will wait for her if she tweets a pic of the train she is going to take. Look here -->
http://instagram.com/p/PCqcYEhM1B/ she just tweeted it before going into the train. You can easily see the train she takes.

So, gurl next time make sure NOT to make your appearance public.
PS: Calling ALL french people insane is kinda insulting, just because some stans of hers in Paris are insane. Just saying.