I went to one last weekend, (Brisbane suburbs), it was a little old lady who didn't want her address advertised. But since the market is hot, there were quite a lot of people at the open, (more than I expected) and the little old lady who had been living there since the 1960's was there, original owner, dressed lovely, too, and she'd make yo have a bit of a connection with the property. Anyway, I think she added to the appeal of the place to be honest!
And I think since the address wasn't listed, the people there thought it was a better opportunity to buy than if the address had been listed, and it actually had a few people going into a bit of a battle afterwards to buy. Anyway, she got her price (and then some) on the day of the open.