Big Brother and the fake eviction

After the farrago of last year's "you're addicted to Big Brother" domestic dispute I have only been watching BB very occasionally this year. Even the little I have seen makes me want to throttle Ziggy and Chanelle and Charley. Did see last night's programme though when unless I was dreaming they said that on Friday it would be a fake eviction with whoever it was going straight back in after the interview with Davina. Is it me or why on earth would you bother voting in that case? In spite of my apparent addiction I've actually only felt compelled to vote twice; once in the very first year to evict Melanie and once last year to evict Grace. So it's most unlikely I would have voted anyway but I really am at a loss as to why anybody would bother this week. I can't help feeling that Endemol or Channel 4 or whoever has just cooked this up now because otherwise Charley or Nicky (Nikki?) would be going and they seem to be the big strife causers.