Good and Bad Christmas times

Went to mother-in laws for Christmas and stayed the night.   The day did go well and she was happy with her presents and the dinner etc.  Did have a nice time.   The dog loved all the food he begged for.   He even got presents.
The bad part was going home.   As soon as we got in the noise went on for ten minutes.   I let the dog out into the backyard and guess what...bread and brussel sprouts had been thrown into the garden, I took photos of them, to show to the Council.   All evening the Noise had been going on and off.   What is that all about?   Are they upstairs doing it just to piss us off?  
Last week tom complained about the noise they were making at 6.30am, they, both of them came to our front door swore at Tom.   They then called the police who came and spoke to us.   We then went to the Council to lodge a complaint.   Do they know this and war has been declared?   They had told the police they want mediation, yeah right!!   So why the constant noise if they want to settle the problems?   Why can they not just be civilized and be reasonable?
I do want to move but t0 where?