Why are copycats in this forum so ungrateful ?

Friends,

One thing which i have observed in this forum is:

Those who are doing the copy paste job are not bothering to quote the source of their information.

This is true with regard to almost all the members( even the respected members) who are posting the jokes, articles and the like.

While i do appreciate their contributions, but i also expect that they acknowledge the original source of their inspiration !!!