I don't think there would be arrest just on the word - there would have to be corroborative evidence. But in a lot of cases the argument would be about whether the action was consensual or not.

There was a case where someone arranged for a woman who had become drunk to be escorted "safely" back to her room, and the escort took advantage of the situation. He was acquitted on the grounds that he claimed that he thought there was consent, and this was supported by the judge. Subsequently, the issue of whether a drunken person can be held to be in a position to give consent to anything has been discussed, and the obvious conclusion drawn. Meanwhile, I think I would want to know if a man I was with had been involved in making such a decision, and his being anonymised would not let me know that.

Penny