Scientists as community of humans should expect there research to return false positives sometimes, because that is what is going to happen, and they should publish those results. Scientists should also expect experiments to demonstrate that some of their hypotheses are just plain wrong. It seems to me replication is only not very useful if the replications of the experiment are likely prone to all the same crap that currently makes original experiments from social psychology not all that reliable. I don't have experience, or practical knowledge of the field, though, so I wouldn't know.