Bubby didn't eat bugs

 https://ohr.edu/this_week/insights_into_halacha/5032

Rav Moshe Feinstein[7] zt"l was asked near the end of his life about prohibiting a certain type of fruit due to a possible insect issue. Rav Moshe responded that it may not be publicized that this fruit is prohibited; as aside for the fact that there were lenient opinions to rely upon (in that specific situation), "it is prohibited to spread rumors about earlier generations, who could not have possibly been stringent on these issues, as they were unaware of them".