If people put anchovy in their bolognese, I can imagine fish sauce is a great and easy substitute. Never thought of that, but will try next time it's on the menu :)
I usually have a tube of anchovy paste in the fridge for whenever I make Caesar salad, but in the rare times that I don't I just use fish sauce in the dressing instead and it works surprisingly well.
Ditto. I've mostly stopped using anchovies for everyday Caesars. The fish sauce trick is just too easy and tastes great.