About number 62 (the pr0n one
) I have a relatively effective strategy. If you use a custom-built spam filter (like me), you should keep all the data in an archive (spamlog.htm was mine) and maybe write an article about how you built an insanely great spam filter. Then, put one link to it there. If you have decent traffic already, those spammers will not affect your main content, but all that spam (which is desired by the strange people), actually ends up on google, and you get quite a bit of traffic on it.
about number 5. That's all about the "Long Tail", which is quite political in effectiveness. Its pretty decent if the approach is genuine and different on a realtively popular topic, but really I haven't found too effective on the less known topics.
