Personally, I'd never preorder an item without a firm shipping date.
That's your choice. As you well know, others make different choices. But the only people who seem to be complaining are the ones who haven't ordered a bag.
People haven't been ignored. The guy who emailed was responded to and shipped a package. He hasn't posted since. The Facebook guy misspoke about the timing of his wife's purchase.
The fact that some people have been ignored (via Facebook or emails) does not speak well for the level of customer service. A company should never be too busy to deal with their customers. Even if there is nothing to report, communication is still key.
You're not one of their customers.
As one of their customers, I'm happy with the communication that I've had with them. What I'm not happy about are the non-customers repeatedly chiming in to tell us how the rest of us should feel.
It's awkward.
They sold a few hundred pre-orders. How many people have complained - actual customers? They're doing okay in my book. Not perfect, no, but just fine.
You can disagree, and that's fine, but I'm going to go back to my day-to-day life. The bag will likely be pretty darn good - I've purchased two of their other models of bags - and I feel it was available on pre-order for a pretty darn good price. I expect that I'll be pleased when it's all said and done.