These is common especially in the western world where you see new love birds showcasing their love publicly,the guy will propose and the crowd will want to see and hear what she would say and when she says yes they will all start clapping ,but now adays we see these kind of thing happening in our own side of the world,anytime I see such I just assume its another form of acting(just like the so called 'Reality show'),now the question in general is Should a guy even propose Publicly to a girl?

Depends on the individual.

Trust me when you see a show off public display of affection, the stench is always there!

Feelings control d mind..4 me its true love