OK, about the wiki thing - there was initially a humourous paragraph about Rhubs & Custy which I believe Rhubs posted - the one at 13.53. Someone posted a link to it - by the time I read it, the second bit about 'up their own arses' was there (posted 16.36).
A few minutes later the third bit, about Peachy appeared.
I went into the history and deleted the second two bits. I left the first one because it seemed harmless.
When I went to complete the delete, I was told that someone else was editing at the same time - as far as I could see the other edit was the same as mine, ie deleting the two second parts but leaving the original paragraph, so I pressed save - so I don't actually know whether it was deleted by me or someone else, but I think it was the other person because I am registered on Wikipedia & it would have given my details, not an ip address.
When I went back to the other thread, Peachy was on it saying she had written the bit about herself as a joke - I didn't realise it was her at first, as she's changed her name
About half an hour later, someone else deleted the original paragraph.