I can't imagine a CG log entree for the day with "saw 2 kayaks and asked what they were carrying for safety gear" and then no personal ID info?
I think getting personal info on any contact with other vessels on the water is standard protocol. It doesn't mean suspicion, its just what they are trained to do.
No doubt, the world has changed since 9/11 and nothing is taken for granted.
The Connyak BBS