Gloria Gooner Referees feel under pressure because they are asked to look out for deliberate fouls? Thought that was part of their remit.
They are put under pressure because Wenger has gone out of his way to say his side are hard done by and that certain sides are putting his players at risk.
He doesn't rant for the good of his health, he does it to try and give his side an advantage. Do you not remember his outbursts at Martin Taylor and Shawcross? They were out of order and over the top and the in my opinion it probably ended Taylor's career in the top flight.