It won't hurt you to eat excess protein for a little while, but I wouldn't exceed 1.5g/kg unless you're hurt really badly. They found no benefits to exceeding 1.2g/kg, I believe it was, in a study that was done. I believe it was published in ACSM journals.
Yes, it is a renal concern.

Of course, this is a longterm thing.


And I still have to disagree, a high fat meal like cheeseburger and small fry should at least satisfy you. If it doesn't, then that is odd. You don't need to feel full to feel satisfied. Of course that's a mentality thing.


Small portions ONLY apply to energy dense foods.
You can have very large portions of high nutrient dense low energy dense foods and be fine, of course. It's much better to eat a large bowl of salad with chicken breast and tomatoes and peppers for example, than to eat 3 double cheeseburgers, but if you were to eat one double cheeseburger, it would be a better choice. However I'd rather eat a huge salad that one cheeseburger.