I'm not sure about the mechanics, but his post
suggests; If Sun forks, people can simply refuse
to run the new code resulting in parallel chain.
The witnesses on the parallel chain would run
a HF immediately freezing STINC Steem on the
new (not steemit chain.) This way, instead of
restricting access to his stake on the original
which would be akin to theft. Something new
happens and all that prior stake is restricted
on the new thing that he with his witnesses
merged away from. Basically, he'd be forking
himself over, and nerfing the value of his &
everyone else's stake. But at least the new
chain's reputation is in tact. We don't steal
stake, but if you upset the balance and fork
the chain over, you won't have access to said
stake on the new instance.