In general, Mackay had a poor game - and he's now had several poor games in a row. Under normal circumstances, he'd probably be getting very close to being dropped right about now.
However, that particular incident (the attempted tackle on Pearce) was a positive from his game. Unfortunately, the board's resident gutter trolls insist on mocking him for it.
how was it a positive? he failed to execute. he should of at least given away a free to hold them up.