Is there a "Silent" ringtone for contacts? Or is using the blacklist feature better?

I have a few contacts (OK collection agencies, :icon_evil that I was screening out through the "straight to voicemail" contact feature.

With other ROMs, I used to be able to set the ring tone from the contacts options to "silent" for these, but I don't seem to have that option available in CM7.
I saw the blacklist option, but can they still leave me messages if I use it? Or does it just not connect for the black listed phone if I use it? Some of these are debts I am actually working to pay back...
(I'm not really trying to skip out on stuff I owe, just a bit too broke at the moment... )

Also, is there a quick silence feature on CM7? Stock has the option to let the phone go silent by flipping it over, but I've yet to see an equivalent for CM7.

P.S. I decided to just block them with Google voice for now, and I'm going to see if the "rings extended" app adds the functionality I want, but feel free to let me know how you manage these on CM7.