OK, so I have a question that's a bit wider than guests:
Why is it ok for some people to cross the picket line, i.e. UNION stagehands, UNION electricians, UNION carpenters, as well as (presumably) non union wardrobe, production assistants, administrative, etc. while it is not ok for guests to cross the very same line?
I don't bring this up as a defense for the bands; I think if you cross a picket line you do so at the risk of your standing with the greater public. I just don't get why the people who show up every day get a pass. Do the writers really expect more from some random actor or band than they do from the people they've worked with for years?
If any other union goes on strike and shuts down their place of work, (airline, newspaper, steel mill), there's no concern for the innocent bystanders; if you cross, you're persona non grata. It doesn't matter that you're a baggage handler and it's the mechanics who are on strike. You're not supposed to cross their line, and when you go on strike they're not supposed to cross yours. It affects everybody's families, and that's part of what keeps the unions strong. This picking and choosing allows the shows to continue, and the majority of people aren't noticing the drop in quality... or they just don't care.
Or are the unions not honoring the picket lines because the WGA is a guild, not a union? I have some experience with various unions involved with music and tv, and they are seriously hard core. Especially in New York. It would seem unthinkable that they would cross a picket line.