An Anagram - as you know, is a word or phrase formed by transposing the letters of another word or phrase.
Someone out there either has way too much time to waste or is deadly at Scrabble.
The following are exceptionally clever. The long ones are incredible.
Enjoy!
 

 Dormitory                      Dirty Room

 Evangelist                      Evil's Agent

 Desperation                  A Rope Ends It

 The Morse Code          Here Come Dots

 Slot Machines               Cash Lost in em

 Animosity                       Is No Amity

 Mother-in-law                Woman Hitler

 Snooze Alarms              Alas! No More Z's

 Alec Guinness               Genuine Class

 Semolina                        Is No Meal

 The Public Art Galleries        Large Picture Halls, I Bet

 A Decimal Point                    I'm a Dot in Place

 The Earthquakes                   That Queer Shake

 Eleven plus two                     Twelve plus one

 Contradiction                         Accord not in it

 This one's truly amazing:
 "To be or not to be: that is the question, whether tis nobler in the
   mind  to suffer the slings and arrows of outrageous fortune."
 the Anagram:
 "In one of the Bard's best-thought-of tragedies, our insistent hero,
  Hamlet, queries on two fronts about how life turns rotten."

 Another:
 "That's one small step for a man, one giant leap for mankind."--- Neil Armstrong
 The Anagram:
 "A thin man ran; makes a large stride, left planet, pins flag on moon!
 On to Mars!"

 And the grand finale: The following phrase is a perfect anagram to
 think about when you look at the guy at the top.

 PRESIDENT CLINTON OF THE USA

 It can be rearranged into:
 (with no letters left over, and using each letter only once)

 TO COPULATE HE FINDS INTERNS