This is an interesting story about the Lego from a container knocked off a cargo ship in 1997, still routinely washing up on Cornish beaches.
http://www.bbc.co.uk/news/magazine-28367198
I've conflicting thoughts on this, it's amazing what good condition it seems to be in, also kinda fun that so much of it is ocean/pirate themed ... but plastic trash in our oceans is a big deal and not going away anytime soon.To that end I'm glad that Lego is a much 'better quality' toy, and not part of the throwaway culture we have.
Not that that stops freak waves, obviously.