My condolences go to his family and friends on his accident. It would be good to try to learn from his loss if we can.
There is a lot in the Brazilian media about this accident in Portuguese. http://bit.ly/RY7nGt
Looking at translated accounts they seem to largely repeat the same information most of which has already been posted here. My lack of understanding of Portuguese isn't helping in this review in picking up more subtle points.
Is there any additional information in the local Brazilian kiting forums? What local weather information I could find was not particularly remarkable but it was for an inland airport and in another case Recife well to the south. There was a large high offshore to the ESE but I didn't recongize a frontal boundary or squall line in the synoptic map. Does anyone have any insight on actual weather (wind, gusts, squalls if any) at Cabedelo at the time of the accident? I could really use some help from Portuguese speakers with local insight on this. Thank you.
Over all the years kiting has been around, many have reacted too slowly, if at all or things otherwise didn't go well in high wind emergencies. Today's kites work far better in this regard but there are still human reaction and adequate timely response to be considered. Best solution, stay out of excessively gusty wind. Still not sure what winds and weather were present during this accident however.