[CharlotteSometimes]

I think it depends on lots of things. As has already been said, if Charley for example was evicted, the volume of the boos would be ridiculous (that's presuming that there's a 'normal' exit rather than slipping them out through a side door under some pretence, of course). She'd be absolutely nuts to agree to going back in, and unless they've got a bribe of some sort planned, the only other carrot they have to dangle is the revelation that the £100,000 is still up for grabs to the winner. But if she did walk out to a cacophony of boos, she'd know that she'd have absolutely no chance of winning anyway, so what would be the point? Even without the boos, she'd still realise that the audience don't like her. And the more hm's that are up this week, the stronger the realisation would be, too.

Then there's the risk of the evicted hm taking spoilers back in with them, too. Okay, so it would probably be too hectic for them to pick up too much information. But all it would take would be someone shouting something, a chant, a sign held up in the crowd, a note passed by someone that they shook hands with, etc. They could be told about the prize money, the fake hm, who the bookies had as favourite, etc. And if the evictee was told about the prize money as an incentive to get them to return (presuming that part wasn't shown to the other hm's), there'd always be the risk of them revealing it, too. Also would the evictee know that the hm's were watching their eviction interview, and if not, what if the crowd somehow got that message across?