Reminds me of the potential low value of say a 5-star review for a restaurant from an out-of-towner. Was that phở soup really that good or just the one they hap

Reminds me of the potential low value of say a 5-star review for a restaurant from an out-of-towner. Was that phở soup really that good or just the one they happened to have, and it’s trounced by any other Vietnamese spot? Lead to ideas of (certain-to-fail) locals-only review websites (that might even enlist folks to do potentially-compensated exit interviews with diners leaving restaurants).