Thanks for the info - but I was thinking more for a section on here rather than for me personally.
I'm afraid I don't agree with you entirely - whilst the two systems your refer to are "safer", there are still scenario's where they are wrong. If someone fishes those in a snag situation - and is fishing badly such that the fish careers through a series of snags, snagging the mainline above the lead, then when they inevitably pull for a break, the lead probably won't discharge! For me, that's not the rig being unsafe, but poor angling - which is my point.