Haha funny guys...
You climb up to the top of the palm (by whatever method works for you), lanyard in, set your choker for descent...then cut every nut and flower spike OFF.
Coconuts are invariably planted on beaches, the result of a 2 to 5lb coconut falling on a person...well, it would not be pretty.
Some flower spikes can produce 5-8 coconuts in one cluster...those suckers are HEAVY!
When I worked at a hotel (the one co-owned by Michael Douglas...he's half Bermudian ya know) I saw one coconut fall from about 8' and hit the wooden railing at the restaurant...broke it, one time.
Then not to mention how they become missiles during a hurricane.
Old tattered fronds get removed at the same time.