What are forms of picketing?

Answer 1

Informational picketing is the legal name given to the type of picketing described above. Informational picketing, as described by Merriam-Webster's Dictionary of Law, entails picketing by a group, typically a labor or trade union, which inform the public about a matter of concern important to the union. This is a popular picketing technique for nurses to use outside of healthcare facilities. For example, on April 5, 2006 the nurses of the University of Massachusetts Memorial Medical Center participated in two separate informational picketing events to protect the quality of their nursing program. Informational picketing was used to gain public support and promote further bargaining with management.

A mass picket is an attempt to bring as many people as possible to a picket line, in order to demonstrate support for the cause. It is primarily used when only one workplace is being picketed, or for a symbolically or practically important workplace. Due to the numbers involved, a mass picket may turn into a blockade.

Secondary picketing is where people picket locations that are not directly connected to the issue of protest. This would include component suppliers the picketed business relies on, retail stores that sell products by the company being picketed against, and the private homes of the company's management. Secondary pickets do not have the same civil law protection as primary pickets.

Another tactic is to organize highly mobile pickets who can turn up at any of a company's locations on short notice. These flying pickets are particularly effective against multifacility businesses which could otherwise pursue legal prior restraint and shift operations among facilities if the location of the picket were known with certainty ahead of time.

Picketing is also used by pressure groups across the political spectrum. Picketing has also been employed for religious purposes such as the Westboro Baptist Church who picket a variety of stores or events that they consider to be sinful.

(i got this from wikipedia)