Why not tie the drybox off to the line, so you don't have to carry it on the dive at least?
How about adding a second flag that says not hunting?
Or how about just ignoring them? "Sorry, I didn't feel the pull on the line!"
I can't believe they actually make you surface. DUI check points, checking inspection stickers, etc. That's one thing, but to make someone come up from a dive, just to see what they're up to is F****d up. You're interupting my dive! Depending on how deep I was and how long I was down, I may not be able to go right back in. It's rude, unprofessional, and inconsiderate. Check anything you want, FINE but at least wait until I'm ready to come up on my own.
And then to give someone crap for doing a safety stop!!! F U! Remember "To Serve and Protect"? I'm expected to risk my safety by shooting right up and not doing a stop?
Or how about I blast him right in the eyes with my Terkel and see how they like it for a change?