Ice block while diving

[DetectorGuy]

My fear with pushing the ice under the ice is about two or three problems: the diver while looking for anchors or what ever circles around the hole (say 1 or 2 times) then he or she swims off in a direction and the floating rope has "lassoed" the block. before you know it the block has been drug back into the hole. Now the diver realized that the only exit has been erased. Panic sets in and the diver looses his or her mind. breathing heavy under the stress he or she starts to free flow... and the pucker factor increases. a couple minutes later the tender finally gets the ice block pushed back under the ice and hopefully all is good again...

The other scenario is that the diver circles back toward the submerged block and keeps making a circle around the submerged block. The diver gets his or her BC snagged on the re-bar that is sticking up off the bottom and the only way to get it untangled is to remove the BC (knowing that the tether rope is attached to the harness below it). during this process the tether rope gets tangled on the re-bar and the diver decides to unhook the tether for a second to untangle it. at the same time the tender gives one tug for confirmation and pulls the rope from the diver. Now the tender realizes that there is no diver on the rope and he or she checks to make sure they are tied off and jumps in and swims toward the direction the first divers rope was. Not realizing that the rope was looped around the block the safety diver is swimming 180 degrees in the wrong direction and the diver is still trapped on the bottom so he or she may as well be in a different lake.

Now these two things may not ever happen, but they could happen tomorrow. Does anyone in this thread think that this could never happen? Why add unnecessary risk to a recreational sport.