If its any consolation, MI (and I don't think it will be...), we still have MILs ashes and she died....ohhhh... about 8 years ago.
In fact I hadn't realised that the funeral directors were still holding onto them, until they sent a letter by recorded delivery. DH had ignored all previous letters sent by ordinary post.
DH and DMIL never got on very well (which I think has coloured his relationships with women, anyway...) and the abandonment of the ashes didn't surprise me at all.
I insist they 'live' in his study, and have nothing to do with them.
However, if they were my DMs ashes, I'd have scattered them long ago.
DSs' friend who died 2 months ago seems to be living inside his mother and a few friends in the form of a tattoo. I can't quite get my head round it. I'm hoping that DSs' money is earmarked for more bike related stuff, and not tattoos 
I know several people who carry around small taped up silver boxes in their hand bags containing their spouses ashes.