What I don't like about BUIP143 is that some BU devs want it to give them "carte blanche" to do a soft-fork against donation addresses.
I'm not at all sure that's needed, or a prudent countermeasure.
My thoughts
1/
After discussion on the BU forum re: BUIP143, I've received a statement from Greg Griffith that "blacklisting addresses was [...] not on the table".
This puts me a bit more at rest.
