boxy, the reason that you shouldn't put protein in the normal compost bin is that it takes longer to rot down, can be smelly, needs different bugs and circumstances to rot down from vegetable waste and is more likely to attract vermin. As i said, the bloke I knew who managed all his human waste that way was something of an expert. Houses are not now allowed to be built without some form of waste disposal system. The bloke was pretty old when i knew him, the local council could have acted under its by laws to stop him, but as they had never had any complain from his neighbours and there was no public health issue (smells vermin and so on) and he was pretty old, they had decided to be kind and sensible and let him live out his final years in peace in his own home. The only thing that needed to be sorted was having carers often enough to empty his commode into the right pit. Normally a chemical toilet would have been put into the house but the chemicals would have trashed the composting function.