Good response - Here's how I dealt with my WAH's spew (mind, our kids were grown): it was in the old days of flip phones and if he called and was spewing on the phone, I would just clap that phone shut. If he called back I'd just say "sorry, I must have driven through a cell phone hole".
Eventually I trained him to only email, which was much less stressful to deal with than text or phone. Also, I kept in mind the dog training tip: Reward the good behaviors, ignore the bad ones.
