Thank you for great comparison.

Don't forget about the extremes of black hat like using other countries to boost rankings withing days.....like Russian hack sites.

This is a technique that is extremely bad and never to be done and is talked about by Alex Becker from source wave.

WA is a white hat place of mind and is not in favor of leading anything black hat although, on cannot see behind closed doors.

Be mindful of your own and do not worry about the rest is what I say.

Google penguin and panda will handle the rest of them.