Ok lets say a newbie diver reads what you posted. And thinks well if a SB staff member says these are OK, then why not. Puts a tennis ball in buddy's pocket and as they buddy ascends he hears the pop.....buddy doesn't know what it is, panics and bolts to the surface. Hmmmmmmm
I love to have fun. I drink hard, I push limits. Ask my friends. I am the biggest prankster out there. I LOVE practical jokes. But you would NEVER see me doing one on a diver.
Red non staining dye......could distract someone, maybe I cut my foot, better check that before I go in....oh better hurry up now everyone is in the water. Jump in, vest not inflated, air not on....panic.....sink to bottom.
If you have read about dive accidents/air crashes it is often times something innocuous that starts a chain reaction of events that ends up in death.
I don't even know what the legal ramifications of posting a practical joke here on SB are. What if a diver does something he read here? What happens to person who posted practical joke? What are SB's liabilities?
The way I see it too much downside risk here..........that is my opinion. You just don't know what chain of events you could be setting off.
Sure you can tell me to lighten up, scuba diving is fun. Yes it is fun. I love it. But really think long and hard about this topic. I am no kill-joy.