Public Service Announcements

Could public service announcements be created by government to sway the public's vote on an issue? How would Interactive Democracy deal with the prospect of a government using public money to get their point across?

For example, does something as simple as warning the public of the health problems associated with smoking have an impact on possible future ballots about smoking on the streets, tax on cigarettes or smoking near children?

I don't believe it matters, so long as the adverts are factually correct. If they aren't, then the government should be held to task by the Advertising Standards Authority (backed up by public power exerted through Interactive Democracy).