Why are all of my recent answers hidden?

Well you didn't answer the question in your very long post on all the questions. You only posted a link at the very bottom of your agenda post saying For information as to why drugs are illegal see my answer here: /question/index... That makes it non relevant so it was hidden.

You should have answered the question instead of pasting the long agenda

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It certainly doesn't happen because of thumbs down since they do not factor into answers being hidden and reported answer do not get hidden.

Yahoo has formula to see if an answer is relevant to question or not. If not it is hidden.

Funny thing several times mine have been hidden when I gave Yahoo's own answer to question so I guess Yahoo thinks their solution is not relevant.

Trick of getting them not hidden is to use key words from question and make sure it has a few more than 4 to 5 words in the answer.

Book length answers tend to get hidden too.

Mostly it happens because enough of your fellow Y!A users either report it or give it the thumbs-down.