Try reading through the getting started part of the forum. Should answer any questions you have on what constitutes a negging offense.
http://forum.sex141.com/eforum/forumdisplay.php?fid=22
Also a good idea to have a read through some of the old postings in forum affairs to see which way the wind blows on a variety of topics.
Personally I see the cultural differences excuse as a cop out.
When I wrote the original report I was a MM full of zeal, now I'm a jaded KK and try to leave the negging to the mods. particularly in the less defined areas such as chat.