When we were buying our house (25 years ago!), the vendor told us that the couple who had built it were scattered at the bottom of the garden. Didn't bother us - infact we thought it was quite nice that they loved it so much.
Funnily enough, the couple that built it lived here for years, but then a couple of families only stayed for a few years each, before we moved in. The night we moved in, DH and I were eating our fish and chips - the kids had been farmed out as we had boxes to unpack - no noise at all, and we both heard a distinct 'sigh of relief' in the hall. Of course, there would be loads of explanations, but we always think it was 'Reg' knowing that the house was again being occupied by a family who would love it - and hang around!
I would not be happy with a grave in the garden though!