coffee > because they didn’t teach it is wrong properly
I think Gemora in Makkos 7 says that it is a teiku whether executing 1 in 7 or 70 years makes a court “murderous” due to excessive execution (you can see the reason by the way it asks from 7 to 70 and not other way around). Then R’ Akiva & R Tarfon suggest not executing anyone, and R Shimon b’ Gamliel retorts that they’lll also increase number of murders.