Frankly, I'm getting a bit bewildered by all of this. On another thread, we've got a discussion about flight planning whilst drunk. Now we've got (I can only assume) a serious enquiry about operating beyond MTOW (BTW the PA 28's I'm familiar with have a balance envelope limited by mass, so how it can be stated that balance is ok but mass isn't is beyond me). What on Earth is going on out there in PPL land?
DON'T DO IT - EITHER OF THE ABOVE.
Personally I find both discussions rather healthy. I'd rather see pilots who ask searching questions about why the rules are what they are, and the consequences of breaking them, rather than unthinking obedience.
OK, obedience is good, but knowledgeable and intelligent obedience of the rules is far better.
G