I have grown golden bamboo for about 30 years. Mine tends to be rather clumping in form, but I keep it fairly heavily harvested for garden trellises. The few times it has run I have pulled the runners back to the main plant and cut them off. I don't water it and the dogs have a path worn beside it with a six foot path between the fifteen foot long bamboo patch and a woodland perennial bed. Had neighbors on the north side of us that didn't mow their lawn for a couple of years. It did escape over there but with constant regular mowing it seems to be back under control.
From my experiences the bamboo trellises get brittle after a few years and do need to be replaced even if they aren't touching the ground.
Many people are very anti bamboo. If not maintained and harvested several times a year I guess it becomes a problem. I am just guessing that the regular harvesting is an important key to maintaining bamboo. I have enjoyed having such a readily available source of supports, fencing, trellis material. I also use it chopped with the mower for mulch.