I also take the point that, by definition, it will be hard for new people to know about a relevant hashtag to use. Many new people will still use (#)introduction. I plan to monitor that tag and keep offering help.
But I think that if we can get dozens or hundreds of us behind the idea of a particular hashtag to help new ueser that it will percolate through the social media grapevine.
How did people get the idea of making an (#)introduction post in the first place after all.