You cite many things that are ludicrous theories with some that are very serious ones. That’s not the way to go about it. Examine whatever theory on its own to see its validity. Throwing it under a general headline (“conspiracy theories”) to examine it is simply blanket-logic and doesn’t hold water.

That’s a very nice tinfoil hat. Where can I get one?
1. The Moon: over 1 million Americans were involved in one way or another with the Apollo project (including employees of the various contractors, etc.) It seems a little unlikely that, out of 1 million people in the conspiracy, after nearly 40 years no-one has talked.
2. 9/11: Where do I even begin? You know what, just read the link below.
3. Titanic: If White Star really wanted to commit insurance fraud, there were many better ways of doing it than gambling with the lives of passengers (especially of wealthy passengers such as made up Titanic’s first-class manifest during her maiden voyage, whose families could have ruined IMM if they felt their loved ones had been deliberately sacrificed for IMM’s profit margins) and valued senior personnel such as Capt. Smith in mid-Atlantic. A fire started on purpose in a coal bunker whilst the ship was empty and at dock (actually a common occurrence in 1912) would have suited such a purpose. Breakage of the hull could then be explained away as a result of the fire. Additionally, Titanic was underinsured by ?2.5 million (12.5 million dollars in 1912, and over $243 million (over ?122 million) in current dollars). In such a scheme, the company stood to lose far more than they stood to gain.
4. Tupac: why would a musician faking his death be a conspiracy?
5. Elvis: see Tupac.
6. Hitler: Adolf Hitler was born in April 1889. If he were alive today he’d have just turned 118 and would *verifiably* be the oldest human being on the planet. (The oldest person alive today, Yone Miniagawa, was born when Hitler was four years old.)

Usually come from dillusional people…
UFO…even the first word is UNIDENTIFIED, as in unknown…but its a UFO, I swear!

you look funny you make money if you kill you get a thrill
and if someone sees it you saved the day

All the other conspiracies are attatched to alternative theories on 9/11 to discredit them. George Bush denied any proper investigation of 9/11 for more that two years. Wouldn’t that bring up a red flag to any rational thinking person?
By the way our government didn’t bring down the towers per se, but they did totally whitewash it and left many questions unanswed. At the very most, they were compliant and criminally negligent for failing to stop the attacks.
You may want to do a little research intead of regurgitating mainstream media propaganda.

If there ever is a real one, nobody will believe it.
Good thing they weren’t around when North America was discovered.