I'm not suggesting they were or they weren't, but they certainly started booing when he came to the mike.
But i am suggesting you have no idea who they were booing.
points supporting my view:
1. essendon fans werent booing Pendles during the game which is usually when they will voice protests about an individual player
2. Pendles has never been a targeted player by bomber fans before
3. Essendon fans were booing about the result well before Pendles was announced as winner
4. Essendon fans feel (rightly or wrongly) they were unfairly disadvantage by poor umpiring, especially in the last few minutes of a close game
5. Pendles engaged the essendon crowd (in a reasonable manner) but this made them respond with how they felt at the time
6. Other than a questionable free to Pendles he did nothing to warrant boos
7. Almost every post I've seen, and people I've spoken to have suggested the boos were not directed at Pendles