if they are encroaching you can trim them legally and without problem - but only what is coming on to your property -
yes. and you can even tell him you are going to do it and ask if he wants his portion trimmed since you'll be out there anyway - if you are so inclined - though not necessary
i see where you state he is not a very nice man and in that case, you might want to take photos of the bushes before and after you trim them - in case he decides he wants to bring some type of lawsuit. not that he would win - but at least you would have photos if you needed them
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