No, I don't think a poster alone can build respect, but it can be an important reminder and work well in a broader campaign. Solidarity groups seem to use posters a lot less than we used to. (everyone should get to know the joys of wheatpasting!)
Osocio titled the following post, copied in full here, The best skin treatment doesn't come in a bottle
Most Australians agree there is little trust and respect between Indigenous and non-Indigenous Australians. That’s why ANTaR launched a new campaign today entitled Respect.
The Respect campaign is a new campaign calling on all Australians to commit to a new partnership between Aboriginal and Torres Strait Islander Australians and non-Indigenous Australians.
The Reconciliation Australia Barometer—a national research study that looks at the relationship between Indigenous and other Australians—showed that nearly 3/4 of Australians surveyed believe that a lack of respect for Indigenous Australians is one of the most important contributing factors to Indigenous disadvantage.
In addition, the Barometer showed that only 1/5 of Australians surveyed know what they can do to help disadvantaged Indigenous people.
This campaign aims to address both of these issues by compelling Australians to think about - and change - their attitudes and behaviour towards Indigenous Australians. People are asked to make a committment to do this. When they make the committment (by signing the pledge), they are sent tips on what they can do to help.
Once people sign the pledge, they will receive 4 emails starting in July, each sent about 3 weeks apart, giving them tips on how they can show respect to Indigenous Australians. The point is that everybody can make a difference, it’s not just up to policy-makers, so the tips in the emails are easy to do.
The campaign is aimed at the many non-Indigenous Australians who would like to work alongside Indigenous Australians to end the disadvantage faced by Indigenous communities, but don’t know how. This campaign will provide people with ideas for action that are simple and effective.
The Body Shop and Avant Card have helped ANTaR promote the campaign nationally. The Body Shop is promoting the campaign in their stores over the next 3 weeks. Avant Card distributes postcards to cinemas, independent bookshops, universities and cafes.
And of course you can be part of the Respect community at Facebook.