I would like to defend the devs in that regard.
I was a witness to a roaming dev, it was on DBL, and they weren't just running back to tag as there was no tag at that time. We met on top of fire keep, where I was just peacefuly running to cap mid shrine to safe my participation, when I was sudenly attacked by a person with Anet mark. I was shamefully defeated, but it was a fierce fight which I remember vividly till this day. They also caped the shrine afterwards so I believe, we can qualify their actions as roaming. It was about 2-3 years ago. I first entered wvw during 2014 wvw tournament.
So with that I once again tell you, that your statement if taken literary is not true!