The effect of the sedition act of 1918 was that it limited freedom of speech.
The Sedition Act of 1918 constituted an Act of the United States Congress that spanned the Espionage Act of 1917 to cover a wider range of offenses, specially speech and the expression of opinions that cast the government or the war effort in a negative sense or was an interference with the sale of government bonds.
It banned the use of disloyal, profane, scurrilous, or abusive language regarding the United States government, its flag, or its armed forces or that made others see the American government or its institutions with contempt.