Avi,
We may be talking at cross purposes.
The "Myth" I was mentionong in my OP had nothing to do with seperation from other aircraft, which I agree is an essential part of Jettison planning.
It had to do with the notion of not descending in the hold while jettisoning, for fear of YOUR OWN AIRCRAFT hitting YOUR OWN FUEL- and THAT is something I believe there is no mention of in any manufacturers documentation.
Thanks for the link- I am reasonably conversent with Overweight v Jettison, and it will always be a judgement call on the day.
And yes, I'd be worried if I was experiencing arcing and needed to jettison- but wondered if anyone had any actual data quantifying an additional risk. Much as it seems a scary thing to do, I don't think a realistic risk actually exists.