There is no point in fighting with them because it will only give them opportunity to show their ego and excited behavior.
It is very rightly brought out in the thread the way to deal with such loafers. If you just pass a smile, laugh in a friendly manner and ignore them so majestically and then leave the place, they will be shocked to see their house of cards coming down so early. That is the best treatment for them.
I congratulate the author to bring out such nice thread.
Knowledge is power.
'Idhuvum Kadandhu Pogum "
Even this challenging situation would ease