Summary

Portrait of William O. Douglas William O. Douglas Eisenstadt v. Baird — Concurrence Douglas (1972)

Baird gave an hour's lecture on birth control and as an aid to understanding the ideas which he was propagating he handed out one sample of one of the devices whose use he was endorsing. A person giving a lecture on coyote-getters would certainly improve his teaching technique if he passed one out to the audience; and he would be protected in doing so unless of course the device was loaded and ready to explode, killing or injuring people. The same holds true in my mind for mousetraps, spray guns, or any other article not dangerous per se on which speakers give educational lectures.
Source: Wikisource

Portrait of William O. Douglas William O. Douglas Eisenstadt v. Baird — Concurrence Douglas (1972)

As a matter of principle a requirement of registration in order to make a public speech would seem generally incompatible with an exercise of the rights of free speech and free assembly. Lawful public assemblies, involving no element of grave and immediate danger to an interest the State is entitled to protect, are not instruments of harm which require previous identification of the speakers.
Source: Wikisource

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