From its mountain temples festooned in ancient phallic symbols to its pristine beaches where Westerners bask in skimpy swimmers, Bali is an island famous for its easy-going lifestyle and sensual charms.

But a new bill designed to define pornography and set a moral tone across the vast, mainly Muslim archipelago of Indonesia is threatening to change all that, according to critics in Indonesia.

Balinese lawmakers, rights activists, artists and tourism entrepreneurs are planning to join forces in a campaign of civil disobedience against what they say is ill-conceived and politically motivated meddling from Jakarta.

They say the bill overlaps with earlier legislation, defines pornography too broadly and will encourage Muslim extremists to enforce their values on Hindu Bali.

"Balinese and other ethnic groups have a different view on what sexual or pornographic materials are," local intellectual Wayan Sayoga said at a protest rally of 5,000 people here Wednesday.

"We can view nudity without being trapped by lust because we look at it from an aesthetical perspective." The bill, which could be passed in a matter of weeks, criminalises all public acts and material capable of raising sexual desires or violating "community morality," including poetry and music.

Protesters wore traditional clothes, see-through temple blouses, performed traditional dances and read a poem that repeated the word "genital."

"The government should never forget that Indonesia is a country based on non-discrimination over race, religion and ethnicity," activist Luh Anggraeni said.

"This porn bill is a serious threat to the country's unity since it disrespects the perspective of others on many things."

Luh Anggraeni of the Bali People's Component, an umbrella group of artists and intellectuals opposed to the draft law, said it would criminalise innocent people who did not follow strict Islamic notions of decency.

"So we will see more women and men arrested in future because they wear clothes or stage art performances that according to the hardliners are violating the pornography law," she said.

The same bill drew large protests in Bali and other islands two years ago, but Jakarta-based lawmakers backed by Muslim parties have pushed ahead with the plan and parliament is expected to pass it into law in October.

Bali Governor Made Mangku Pastika has said the bill fails to consider cultural diversity in a nation which stretches from the conservative Islamic province of Aceh to the animist highlands of Papua, where women go topless and men wear almost nothing but long gourds on their penises.

"It should provide sufficient space to accommodate the prevailing local wisdom in different communities across the nation," former police detective Pastika was quoted as saying in The Jakarta Post.