I think that would be a really good trick. Just keep swapping them over.

Lol this happened a few years ago in a bb abroad somewhere, I think it was AU or US. Its hardly your idea :')

Rather than twin swapping, what they should think about is waiting for the house to split in 2 and one be social with each group. That way, when it comes to noms, they're less likely to be up for eviction as each group would be less willing to vote for them.

I should point out I'm not a fan of them and hope they don't use a plan like this.

I thought it was here?

it happened in both, i believe bb5aus and bb4usa (or maybe 5 also?)

Both were Season 5 of Australia & US. But US's was in 2004 and Australia in 2005. In both cases, they started out switching, but eventually both twins became separate housemates.