No, it is not illegal to spread human ashes in Oregon. A property owner could sue you if you do not ask permission to spread the human ashes on their property though.
Not on the Nevada side.
Check with the county where you want the ashes to be spread. Disposal of human remains (including cremains) is governed by county and city ordinances.
If you are referring to spreading of cremated remains: It depends on which state you are looking to spread in. In California, to spread ashes in the ocean it must be done 500 yards off shore. One cannot spread ashes themselves off of a bridge, pier or dock. On private land the land owner must give written permission. Some cemeteries offer scattering gardens for one to do the scattering themselves. There are companies that will scatter ashes for you by aircraft or boat, just to name a few options. Here in California ashes can be spread in the Pacific or Bay waters or on land.
Check the Ohio Funeral Directors Association websiteIn Ohio There are certain places it may be done and certain places where it may not. The Association also advises you on how to ask permission to scatter remains in state parks where it is normally prohibited.
It is not legal to dispose of human remains anyplace. You are not going to be able to legally arrange to scatter your husband's ashes in the Seine.
No
It is generally not illegal to spread ashes on top of another grave in a church cemetery, but it is important to check the cemetery's rules and regulations as they may have specific guidelines regarding this practice. It is also respectful to obtain permission from the cemetery management or the family of the deceased in the neighboring grave.
Poo
No, the cremated remains of a person, their ashes, do not change over time. The ashes are what is left of the crushed bones and will remain as that.
Charred. Scorched.
It isn't illegal to spread human ashes as long as the owner of the property gives their OK. Whether the Red Sox would consent to it is another story. If this is what you have in mind, you could write a letter to the Red Sox explaining the situation. The mailing address is Fenway Park, 4 Yawkey Way, Boston, MA 02215.