I saw ashes turned into synthetic diamonds, made into glass paperweights and jewelry, flushed down a toilet, and loaded as buffer into shotgun shells. To each his own.
I knew a girl that was widowed at a very young age. Her husband was quite a bit older, and a biker type scumbag.
He got killed in a bike wreck of course... She told me that they had a big party and mixed his ashes into a large doobie, and everyone got high smoking him and the marijuana... She said there were probably enough drungs in his ashes that everyone would have gotten high even if they left the pot out.
