You could shorten that to: jumping off rocks without a parachute kills. Father of two engaging in this? Moron.
If you're young, you have no dependents and you feel like life probably isn't worth living then go for it, otherwise better not to pretend that you are a bird, you aren't. Birds have lots of options, wingsuit flyers (all terminology and pretense to the contrary) are not flying as much as they are falling and gravity has no mercy.
It's definitely a super-dangerous sport, but I know a few guys who have been doing this for a long, long time and understand the risks and keep their egos in check. They have a plan and they have outs. When done right, you are diving hard at the terrain to stay attached to the line, so if anything goes wrong you relax and separate. Some of these people have kids. None of them are morons :)
If you're young, you have no dependents and you feel like life probably isn't worth living then go for it, otherwise better not to pretend that you are a bird, you aren't. Birds have lots of options, wingsuit flyers (all terminology and pretense to the contrary) are not flying as much as they are falling and gravity has no mercy.