Here's a picture of me, on the west beach of Berneray. I'm the one strolling along with a handheld games console, trying out a game (part of what I do for a living is evaluating the effectiveness of digital games in curriculum-based education). Sensible, as I get work done, and burn a few calories at the same time. The only danger of this kind of working is of not keeping too close an eye of the waves/tide coming in, and getting a bit wet.
Occasionally, you'll be strolling along and see someone perched up on a dune with a laptop, working away (some people use I think its Vodaphone broadband so they can roam around and be online).