I've been looking for a comment like this through a LONG list of shitty reactionary comments.
This is just a neoprene bag with what appears to be a lock like they put on clothes to prevent them from getting stolen. Since I don't get two shits about their bag, why wouldn't I just cut it open and throw it out? Walk out at the end with my phone and, if they ask, say they missed it when I went in. If they're holding something hostage in return for the bag (my credit card, or just the number so they can charge me), then that's a separate and, IMO, bigger problem. I don't want to be responsible for their bag.
That said, I'm REALLY missing the comments about how one can circumvent these bags. In the slashdot of old, that would have been in the first couple comments, if not a link to a page documenting it in the summary.