I think the practicalities of D are a bit big for a 'statement' - easier/cheaper to go NC for 30 days, run off to Fiji for a month with no internet/phone, donate his favourite clothes to Goodwill, 'accidentally' break his laptop/tv/car....add your own suggestions here.
When in doubt, just give yourself time to breathe and think. Your actions are for you, not to send a message or try to influence someone else. Just for you and what feels healthy for you.
Me: 53 H:38 T:20 M:14 BD ILYB etc 10/15, H diagnosed severe depression S 1/16 PA 4/16 H filed 1/17