Actually, it was perfectly realistic for the Whoniverse. The existence of extra-terrestrial life has become common knowledge.
In the Whoniverse's 2006, Tony Blair was assassinated and Big Ben destroyed by an alien spacecraft that crashed into the River Thames as part of an alien plot to destroy the Earth. The Doctor thwarted it when he hijacked a Royal Navy missile to destroy 10 Downing Street and thereby kill the alien who was impersonating the Acting Prime Minister.
Then on Christmas Day 2006, a giant alien spacecraft appeared over London and a third of the world's population was held hostage with a mind control technology that affected people with a certain blood type. That ship was later shot down in orbit.
Subsequently, in the summer of 2007, an army of 5 million cybernetic organisms from another dimension intent upon converting the world into their image, known as the Cybermen (who were created long before the Borg), manifested itself at locations all across the globe due to the irresponsible actions of the Torchwood Institute. The Doctor managed to suck them back into the void that exists between dimensions (at the cost of his best friend and would-be lover, Rose Tyler).
On Christmas Day 2007, London was attacked by another alien ship that appeared above the city. The Doctor managed to kill its pilot and thwart her plans (inadvertently draining the River Thames in the process) whilst the British Army shot down the ship.
Several months later, the Royal Hope Hospital in London was teleported to the Moon by a species called the Judoon who were looking for a fugitive and couldn't search the hospital while it was on Earth for legal reasons. The Hospital was later teleported back; at the same time, there UK elections were on, and one of the candidates for Prime Minister was talking about the existence of aliens as part of his campaign platform.
Then, in late 2008, newly-elected British Prime Minister Harold Saxon announced that he had made first contact with a new alien species called the Toclafane. Unbeknownst to anyone else, though, the Toclafane were working for him; he used them to assassinate the US President before the Doctor could stop him.
Then, after that, on Christmas Day 2008, Buckingham Palace nearly became ground zero for an alien luxury ship that was crashing to the Earth before the Doctor saved the ship. Then, just a few months later, an alien species called the Sontarans used a widespread new car engine system they'd planted in an attempt to poison the Earth's atmosphere to exterminate the population to use the planet as a breeding world. The Doctor and UNIT (the Unified Intelligent Taskforce, a branch of the UN) stopped them.
Then, in the summer of 2009, the entire planet Earth was transported across the universe to an area of space known as the Medusa Cascade by a group of aliens known as the Daleks, who were using Earth, along with twenty-six other planets, to emit a weapon known as the Reality Bomb that would have devastated known space. The Daleks invaded Earth in the process, destroying much of London and New York, decimating Earth military forces, and apparently killing both the new UK Prime Minister, before the Doctor and Company managed to defeat them and return Earth to its proper orbit.
Bottom line: It's common knowledge.
when did he say he was going to make porn?
If he had said they create "gates" or "holes" or something vague about the spatial tunnels, I'd be a bit more understanding. But, wormholes have a definition in real life. It would be like someone asking "What is the force that keeps all objects drawn towards the ground?" and the answer being "Solar Flares" (instead of gravity).
While wormholes are theoretical, I can damn well know (just by their theoretical definition) that you can't create one by "going really fast". It's like the 1970's Superman movie, flying around the world to reverse time. Come on, haven't we in the 21st century moved past the moon-made-of-cheese beliefs in science? Even in the general population?
I guess it's what you mentioned. Biologicals rending physics. It just throws everything into strictly magical fantasy world (kind of like the Sonic Everything Wand he carries these days). Don't throw "sciencey" words out there if you're not going to bother trying to at least know what you're talking about. Lazy writing.
Just my opinion, of course...
