Nearly half of Australians surveyed would consider changing banks if they became aware that the bank was behaving unethically, according to a new Oxfam Australia poll released yesterday.The national survey, released in conjunction with the report titled "Still Banking on Land Grabs", examined attitudes towards Australian banks and ethical investment.Oxfam said 47 per cent of Australians polled said that if they became aware that a bank was behaving unethically, it would strongly influence their decision about their choice of bank for future banking needs.Of those surveyed, 75 per cent didn't think that banks should provide loans to companies behaving in an unethical way, and 80 per cent of Australians polled believed that banks with investments that harm a community should provide some compensation to that community, Oxfam said.