Proverb. talk is cheap. (idiomatic) It is easy to make boastful or unrealistic statements which are not backed by actions or evidence.

talk is cheap - Wiktionary, the free dictionary

Wikipedia

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Free speech is free because it accomplishes so little.

Free speech is sacred because it allows mouse click warriors to vent verbally instead of physically.

YOU ARE A FAGGOT to the Military 

a typist diary keeping FAGGGGGGGGGGGGOT