The total spacecraft mass is about 100 kg - there's already tons of junk on there from Apollo, Luna, and the dozens of other craft that orbited or landed/crashed there in the 1960's and 70's. Why is this so terrible? Because it's allowing ordinary people to drop their precious little do-dads up there, rather than our hero Alan Shepard's stupid golf balls?

Plus, TransOrbital is encasing at least some of it (the "cremains" part in particular) in a metal canister that is supposed to survive impact, and so these things aren't supposed to be just scattered all over the surface. I believe they had to do this to meet NOAA's interpretation of some outer space treaties.