This feature should NEVER be on a cab. You never know when some kid finds the option.
Also, I wouldn't want to delete a rom because its a non-english. You might find that its either a parent rom for a US version (under another name maybe) or will be soon.
Hopefully you can ignore them in your frontend. Mine you can ignore all but favorites over a set number. I wanted to add this to each skin, but I never created the UI to do it (but the backend you could). I could also do it by adding SQL to say I'm only interested if the favorite setting is better then others, but I can't remember if I ever tested this.
Anyway, I think this should be part of your frontend to hide it instead of kill it. You never know when you need the rom again.