Per MLB rule 7.05(d), each runner, including the batter-runner, may advance two bases, if a fielder deliberately touches a thrown ball with his cap, mask or any part of his uniform detached from its proper place on his person. The ball is in play.
It is not illegal. Here is the US Gov'ts ruling on it.
russia
It is not illegal. Here is the US Government's ruling on it (see the related link).
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.
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.