I did a horrible thing. I checked with WDFW first, then went and got a bunch of Sand Shrimp, cleaned them, battered, deep fried and ate them. Friends tried them as well. They taste like, well, shrimp. Have done it again since but skipped the batter and used just a bit of salt. I like them!
They filter/eat differently than razors or crab, so are Ok to eat. Or so I was told by three different biologists.