liverpool 's mario balotelli receives more abuse than any other player .
the italian was on the end of 8,000 messages , with danny welbeck receiving 1,600 in a study carried out by kick it out .
anti-racism campaigners found 134,400 derogatory messages were made in just seven months on facebook , twitter , blogs and other social media .
rio ferdinand was fined for including the word ` sket ' in a tweet .