We have a strip of grass in between our drive and the neighbours drive and they have occasionally run their lawn mower over it when they are doing their lawn, which we haven't said anything about as we don't mind.
We came back from a trip and found little patches of dead grass on this strip...so we popped a letter through their door asking if they knew anything about it and if so, what they had used.
They responded that they felt they had to take action as the weeds were bringing the tone of the neighbourhood down...but because they have children too they hadn't used anything nasty but had put petrol on the weeds instead.
AIBU to think that using petrol as a weedkiller is U in the first place but doubly so if you put it on someone else's grass?