For this concern, i like what Enrico has provided:
for critical data, to protect myself from fat fingers
I use an initial macro to issue an AUTOSAVE PROMPT, so that it nullifies PF3
and forces typing SAVE in the command line
I am also a big believer of regular (proven) backups. . .
I also offer that if these members are "special", not very many should have the ability to update them.