> Third, the sender lists an 800 number and is obviously in business. Perhaps
> there is a way to tie up her phone line with the same type of nonsense as she is
> using to tie up our list. Maybe lots of calls on a single day coordinated to
> basically shut the line down that day.

I highly recommend against this.  A decent lawyer could easily convince a
court that this is an illegal "Denial of Service" attack.  And an 800
number holder can see the phone number originating each call.