No..
Many threads are similar to other threads, but they are not all parodies by a long shot.
par·o·dy Audio pronunciation of "parody" ( P ) Pronunciation Key (pr-d)
n. pl. par·o·dies
1.
1. A literary or artistic work that imitates the characteristic style of an author or a work for comic effect or ridicule. See Synonyms at caricature.
2. The genre of literature comprising such works.
2. Something so bad as to be equivalent to intentional mockery; a travesty: The trial was a parody of justice.