Bans on Communist symbols were introduced or suggested in a number of countries as part of their policies of decommunization.
Communism alongside Marxism-Leninism are officially banned in Indonesia following the aftermath of 30 September coup attempt and the subsequent anti-communist purge, by adoption of TAP MPRS no. 25/1966 in 1966 and Undang Undang no. 27/1999 in 1999, which are still in force. The law does not explicitly declare a ban on symbols of communism, but Indonesian police frequently use the law to arrest people displaying it. Some of its violators were people with no knowledge of symbols of communism, in which cases the authorities frequently freed them with only minor punishment or small fine applied. However, displaying such symbols in an attempt to intentionally propagate communist or Marxist-Leninist ideas are an extremely severe offence, even considered as treason against the country and could be punished by up to 20 years of prison. This makes Indonesia a country with strongest anti-communist policy among other states that practiced such policy.
Other socialist and left-wing related symbols, while not officially prohibited by law (as democratic socialism itself remained acceptable in the country, as long as it does not include communism altogether) are still widely condemned by the Indonesian people and considered as being closely related to communism in general. These include the red star, the socialist heraldic emblems, the red flag, and anthems or slogans such as The Internationale and "Workers of the world, unite!".