This one is a weed too. It marched through our garden beds some years ago and with quite a lot of diligence I got rid of them. These ones are on the neighbours side of the fence and I am happy to enjoy their pretty flower just so long as they respect the borderline. (Which of course they won't but nor do the weeds I send the other way).
"The Lord will bless his people with peace." Psalm 29:11