I'm at war with bamboo. Both neighbours have it on our side of their gardens, and it sneaks under the fence and grows and grows, no matter how much I try to cut it, dig it, napalm it, etc. My question is this: if I buy one of those paint-on weedkillers and use it, will it also kill the bamboo in my neighbours' gardens and thus alienate these lovely people forever? I honestly don't know what else to do. It's even growing up through the lawn. I fully expect to find it growing up through the floorboards any day now.