Have you ever wanted to Discuss something online but became turned off by haters, teeny boppers or people with nothing worthwhile to say? There is a place where the standards are very high and all silliness is eliminated: International Discussions

Specific Boards can be seen here (site map):

1. UFO Discussion
2. Military Tactics & Discussion

Not necessarily Science Fiction but interesting:

A. Writers & Books Discussion
B. Near Death Experiences & Discussion