I do it but not work bro
Not possible. If you've added someone in your ignore list, He'll see a notification ''User '
name' has blocked your personal message." You also will not be able see what the ignored user has posted unless you force it.
Currently, PM limit per hour is 20. Which I think is useful as sometimes we need to discuss and indulge in long conversation. No need to reduce the PM count.
Suggestion Denied.