What to do with My Noxious Butterfly Weeds?

In 2006, before my house sale closed, I began buying plants for my soon to be garden.  I was living in Beaverton at the time and one of the local plant places I visited, went out of business. 

The nursery had a big going out of business sale and I got many great plants for almost nothing.

What I ended up with included three Buddleia davidii (Butterfly Bush). I believe the varieties were 'Black Knight', "Royal Red' and 'White Profusion'.  They were $2.00 each. What a bargain! 

The noxious weeds are left, center and far right (behind the Arborvitae)

My mother had Butterfly Bush in her garden in Wisconsin and I always thought they were pretty.  Since I wanted to have a garden appealing to bugs, butterflies and hummingbirds, they seemed like a good plant.

I planted the the three Butterfly Bushes in the front border of the perennial bed across the front of the yard. 

'White Profusion'

I learned a little while later that these plants were on the State of Oregon's Noxious Weed List and they they were going to be illegal to sell at nurseries in the future. They would only be able to sell sterile varieties going forward, but it didn't mean I had to remove mine of course. But it kind of made me want to.

"In Oregon, the ODA officially classified it as a class "B" noxious weed in 2004. This plant is a pioneering species that dominates open habitats. It poses an ecological threat to dry-land meadows, open slopes and dunes, dominating these sites as much as Scotch broom has historically. It also invades reforested sites, resulting in a loss of forest productivity."

But they smell so pretty.

Once I knew they were potentially invasive "weeds", I took care to keep them from spreading. Every year before the blooms go to seed, I hack them all off to make sure they do not seed in any part of my garden (I don't want to pull them out either!) and I compost the clippings.  Every fall, I hack the entire plants down to about a foot in height.  'White Profusion' still manages to grow to 10' each growing season.

"Bee Nirvana"

Each year before they leaf out, I think about ripping them out, but they are kind of like old friends.

If you were me - what would you do?