I do follow the discussions except for when I go into a delete
binge. However, your email was too big which meant it must have had
something of value in it which it did. :)
This has probably already been said but:
Advantages sysctl:
No kernel recompiles to change behavior. Gives lots of control to
the superuser.
Disadvantages sysctl:
The "signal inherit" state must be kept no matter what behavior the
system is using at the time. Code is more complex, etc.
Tom