Firstly I haven't caught one yet, in fact I've yet to try to catch one. However, I'd love to address that sooner rather than later, though it does fill me with a rather large amount of trepidation!. Personally, I think you have to be somewhat mad to attempt to tackle such a large fish from a kayak, a large fish with with big teeth!.
That said my good friend Graham Smith has gone and done it again, catching yet another large Porbeagle Shark from his kayak. He's based in Ireland and has access to some superb fishing.