Agreed.
I mean, when I started lurking on here a long time ago, I'd never heard of George Melly (a generational thing) or Anne Feeney (an obscure folky thing) yet now love both. I'm still not really sure who Shaw Taylor was, but still, its cool to be introduced to new things. On the flipside, people I assumed were widely known (Timothy West, for example) drew blank faces from others.
In other words to the guest, its a small world, aye, but no need to be small minded in it.