It is not illegal. Here is the US Government's ruling on it (see the related link).
russia
The ruling made by the supreme court is that demonstrations on the private property is illegal.
Ground rule double
royal, courtly, solemn, just, brave, ruling, arrogant, militaristic, dignified, self-absorbed, distant, detached, weak, strong, learned, wise,
Illegal means a work that is prohibited by the ruling system of the particular country or the said country and which is not permitted by the national laws and regulation.
Which endzone?
Technically, no.It is in what is currently a legal grey area, where no clear legal ruling applies, but probably there should be.
Johnson vs. Virginia - April 29, 1963.
Jailbreaking an iPhone is not illegal, but it does violate Apple's end-user license agreement, which could void your warranty. It may also expose your device to security risks and void Apple's guarantee for providing help with troubleshooting.
Supreme Court ruling it is not illegal to display a temp tag in the rear window! As long as it is displayed and valid! Permanent Tags are illegal to place in the rear window! If the tag is temporary then it can go in the back window
Go to www.randa.org where you will find a section on 'driving clubs' on the home page, which explains the ruling in more depth.