100% agree with KSC. Way too many ropes have been thrown into Gore. Makes me wonder what people are doing with them? What was done wrong that caused the rope to be lost, and what can be learned so that others do not repeat the same mistake?
I've seen two main ways ropes get lost, both preventable. First is not securing them properly in a boat that comes out in a swim (as K mentioned), and second is throwing ropes from the wrong place, setting you up for failure.
In my opinion, the best place to set rope safety for gore rapid is at the very bottom of the rapid at the head of either large eddy (L or R) that forms in the slackwater after gore and above scissors where many people eddy out. I see a lot of people setting safety higher... the eddies above where there is still strong current in the main flow, at ginger, on the rocks below the sneak. I have seen people get yanked off their feet when swimmers catch ropes while still in the main flow when ropers try to throw from to high up in the rapid. I have also seen people let go of the ropes when the pull from the swimmer in the current is too strong. I am constantly surprised that people set up next to fast current with a rope... I know you can't hold on to the rope if someone catches it, and you are probably going to put a rope in the river.
Next time you go to gore, look at the rapid and you will see what I mean. If you see people setting ropes up high, tell them that the best safety spot is at the bottom. I've roped many swimmers out at the bottom, and was able to grab a lone raft with my hands as it floated by. Bottom set up is absolutely the best place to catch swimmers before they go into scissors and to get gear out. Swimmers have to get out of the gradient and fast water of gore proper before you have a decent chance of getting them out.