Yep, folk do look out for others. We do a similar thing here when folk go off walking in the woods.
The kayakers did well though, the Isle of May is a long paddle from North Berwick. However, I do think they should have had the foresight to let the CG know of their intentions. It was a thick fog today and they will have had to cross the shipping too. It's not so much a channel there, the ships could be anywhere. A bit scatterbrained, maybe. The island is a reserve, I wonder whether they got permission to camp.