Several controversial euthanasia billboards have begun appearing on some coastal roadsides in New Jersey and in San Francisco.

The signs, which were put up by the right to die advocacy group Final Exit Network, target terminally ill people who want help committing suicide.

The message on the black billboards reads, "My life. My Death. My Choice."

Final Exit spokesman Frank Kavanaugh said he wants to get more people talking about the right to die either with or without a doctor's help.

"We believe that the ultimate human rights issue of the 21st century is the right to die," Kavanaugh told ABC News.

But critics say Final Exit's campaign is far from benign.

"Any time you talk about suicide as a way out, you get into a whole litany of problems. Offering information on how to commit suicide, I think that's a very dangerous thing and open to misinterpretation by a number of people," said Tim Rosales, spokesman for Californians Against Assisted Suicide, a group that works against legalizing doctor-assisted suicide.

"Troubled youth, people who are depressed or going through a tough time in their life -- this type of activity preys upon those people in society," he added.

The campaign started in June and is expected to get even more exposure after an anonymous deathbed donation to the Euthanasia Research and Guidance Organization. The money was intended to supply as many public libraries as possible with the book Final Exit.