I think whether a plant is a thug or not is largely dependent on your zone/climate. I've heard that trumpet vine CAN be invasive, but I did not find it so. I had one in the same spot for several years and it increased normally but not aggressively. I moved it to another spot and only had to pull a couple stray sprouts the next year from the old spot. I pulled it out completely from the second location, and haven't seen it since. Definitely not a plant I would consider a pest or invasive, just a non-bloomer for me.
