Hmmm.. i think it some are just trying to show off their wealth... And some not rich also wanna show off.. Thats the funny part..
well, i wouldnt say all are arrogant as its sort of over-generalisation...

but i do come across alot of such peop.. So, noa choice but to bear with it..
As long as u know u did the right thing, just don care them.. life is short, thus must be happy
