There is a "Old Trek-vs-New Trek" chat room, but in "Where No Fan Has Gone Before", even mentioning Star Trek is illegal. To be fair, a lot of illegal things take place on the internet.
Farnsworth states that there are only two parallel universes, but in The Farnsworth Parabox, many universes are shown. Those universes however may have only been created in that episode. Possible Solution: Perhaps they existed previously, but there was no way to access them (and thus no way to detect them) until the boxes were created.