Oh yeah. Like I said, I'm more than willing to give Doctor Who a huge amount of good will and ignore an awful lot. If plot holes are something that really grind your gears, then Doctor Who likely isn't for you. It's not too hard to find them in any given episode.
That episode is at the top of my list of ones to suggest to people who have never watched the show - I think it's a top-notch one-shot story and a great example of what the show is like a lot of the time.
I think they missed a trick here - earlier in the episode there was a comment about walking away and leaving a shoe behind (one shoe, but never mind...) Given that the trap worked by some sort of molecular bonding, all they needed to do was establish that Ruby was wearing some sort of slip-on footwear, and that's most of the problem solved.
I think it was more that Rogue stepped into the field right as he pushed Ruby out, thereby satisfying the field's programming/limitations.
Was she, though? Why did she show up everywhere? Why is she a genius who made a software platform who has dreams of different versions of herself? I hope RTD explains that next week, but I worry, like 'Bad Wolf', it's going to be left as just "I just said this word lots of times and that's plot seeding! Now tell me how clever I am!" ... but there's no actual plot, just a repeated word (or actor). She turned out not to be a twist, just a meme.
