Yitzchok Frankel has responded that Rav Dovid Feinstein disagreed and said
that one can accept the testimony of another Jew that a specific item is
kosher therefore that would include grasshoppers.
It would be interesting if other readers have heard rabbinic opinions about
this issue. I assume that it is not more popular since there is no major
push to eat grasshoppers. However, this issue might also have applications
to other areas.
Eli Turkel email@example.com