I saw it and while it was an entertaining bit of Sunday night telly, it was pretty sloppy in places. To say that the whole concept hung on a 'what if this really happened today?' type scenario, there was a lot of things in this show that I found extremely hard believe, so the effect was ruined for me really.
I really didn't like the conclusion either. To keep in with the whole internet theme, very mild spoiler: we didn't need to know who the perpetrator was at all. They should have remained anonymous.
Still, it wasn't all bad. To be honest, I found it pretty funny and I was gripped enough to watch it to the end. I'll be tuning in to see next week's installment.