I'm guessing it'll be a combination of things:
-The public outrage about Caroline Farrow/Harry the Owl being contacted by police.
-that Mail article on Kate being arrested. A while ago now, I know, but the reaction to it was huge. And global. And not a lot of people supported Hayden.
-glinner being a popular public figure, with (no doubt) excellent legal representation.
-Helen Islan's embarrassing failure in court.
-Helen Islan's own twitter activities being scrutinised in court. Hayden's twitter activities are far from perfect - all those veiled threats with Harrop "let's visit Caroline's church...with golf clubs" type quips. Wouldn't look good to a judge that.
Let's hope Kate's is dropped too. Kate, if you're reading, and this gets that far - please crowd fund for a decent Barrister (like Gudrun Young, Miranda's barrister) - I'll chip in. You have lots of support here 