First of all I love your User Title " Kanch ke Guria"
Some definetly do , like you will see their comments , style of expression and the way they bring things behind a strange User ID from anonymious location.
They will express their those feelings , they wont express to their friends in their social Networks or other social circles.
But many have other reasons for being active on cyber networks one of them is Like PCG points , she deems herself , confortable with socializing on Virtual social networks plus it does not affect her schedule.
For me myself I would say , being in huge Desi community here in UAE , i have very little access to Paki: communities due to working timings and daily commute etc.
Plus I have more variety of Paki people who belongs to Pk by origin but have grown in other parts of world hence have varity of lovely Desis.
Secondly, socailizing character is inheritely given to every men/women , and we were in thurst for it , now technology have brought us together, which definetly people are utilizing.