Role Conflict

I was at a cafe at the airport just now with SC, studying......

We were there a couple of hours..... then came the waiter saying,

" No STUDENTS allowed!"

At that moment, I feel that there was a role conflict..... 'cos I am a customer, thus I have my rights to stay.... But at the same time, my role is a student....

Thus, to spite the waiter.... cos I just can't stand his attitude, I decided to cast away my student role for that moment and enjoy my customer role.... so I kept away my notes and slowly eat my pastry.....

My attitude would be better IF he had said this instead,

"I'm afraid no studying is allowed here."

Cos no studying = no studying BUT students are allowed......
BUT NO students = NO students whether you are studying or not.....

See the difference?

BTW it is not so much about what he said BUT how he said it....