Here are some tips that work for me.
I use the advanced search feature (right under the search box) and select to search keyword title vs keyword entire post. Plus this thread http://www.he-man.org/forums/boards/...he-MOTUC-Index is an Index thread that can help you find threads for a particular character.My last complaint...the search engine sucks...if you don't want to see repeat questions...you need to make the search engine more user friendly. example...I type in Hawke...NOTHING comes up about Hawke...I know there has to have been questions about her in the past. The same things happens no matter who I type in the search bar...it just does not work well.
There are also many threads for more obscure character in the character support and speculation forum. I am pretty sure you can specify to only search that forum in advanced search as well.
I hear ya and I have been on some forums where that has happened to me, but not here though. If I have been redirected to an existing thread it has been done with respect by the mods.I am scared to even start a thread because people will be sarcastic and say...search engine dude...that question has been asked a thousand times. Well...I can't figure out how to use the search engine...lol
The only subtle nuance I can think of is that pre-sale discussion about figures, designs, accessories, etc... occur in their speculation/discussion thread but post-sale the discussion typically moves to the grouped together arrival thread.
I hope that helps you navigate around a bit better, have a good one!