I am frankly appalled at OVC002's seemingly cavalier attitude to limits. That sort of attitude has NO PLACE in aviation. Perhaps I will raise the topic with the CAA's GA safety department and suggest that they remind people about the dangers of exceeding limits in the next GASIL....
The MTOW is precisely that. If you need to apply for some waiver to operate above that weight, go ahead. If not, then observe the limit!.
But to state that "we all agree that operating 10% overweight is safe" is rubbish. I for one certainly don't!