We live in a semi detached house. We have a privet bush in the front which spans the whole of our front and next doors. In all the time they have lived there (3 years) next door has not cut their half. We usually cut it when we cut ours as it'll look daft if we don't. They usually come out and say thanks (like literally that's it, we don't really speak) while we're doing it. We would also usually put the leaves in the garden bin. However this year we have to pay for our garden waste bin and it gets pretty full from our garden waste and will be overflowing when we cut our bush (been putting it off for ages) so we can't put their rubbish in our bin too (they don't pay for their garden bin) WIBU to not cut it? We have a petrol hedge trimmer (they don't) so it's easier for us and I'd feel bad not doing it, but at the same time i feel why should we? BTW we'd always cut it for the old couple who lived there before them, but they were much more grateful and less able.