Adultery = There is a lot wrong with adultery. Cheating on one's spouse is a reprehensible offense and an adulterer is never respected. We believe that one should never commit adultery not because of the fear of being punished in hell but because of respecting one's commitments and place in society.

Bestiality = Whoever told you that atheists accept this misguided you.

Alcohol = There's nothing wrong with drinking and staying within yourself. However, drinking and driving is a horrendous crime. Interestingly, most Middle-Eastern wife-beaters or Pakistani acid-attackers are drunk with anger, not alcohol. What's their solution?

Lastly, you failed to say what's wrong with that two consenting adults do indoors. Moreover, 'atheists' are not a religion - they have no dogma. So what one atheist may believe will vary vastly from what another may uphold as the truth.