Hey guys, you're both right!
It's more than obvious that no matter how the protection systems work, if they pop, they blow up, they dilatate, or they explode like a nuclear bomb of if a SOS sign starts to blink on the top of the mixer. the most important thing is that little piece that goes in front of the mixer... THE USER!
No matter how good the appliance is, if abused it's going to be damaged, that's simple as 1-2-3 and we all know that.
The density is the most important fact. 2 cups of flour and some liquid + the wrong attachment, will damage the attachment (thank god it's the first thing to break) and/or the transmition, motor, etc.
the same 2 cups of flour but with lots of liquid (less density) is OK, even if we choose the wrong attachment. (It's going to make a mess maybe, but won't hurt)
I overloaded my KA mixer with Nescafe sugar and water. The overload lasted less than 5 seconds because I could hear the different noise and reduced speed imediately. Most of the users hear the different noise and the machine loosing speed but don't care.. they just increase the speed to try to compensate. or even worse, they wonder