A palindrome, for the benighted, is a word, phrase, or number that is spelled the same backwards as forwards. To me, it's even more than that: a way to pass the time on public transit or in the Hell of  overcrowded airports, which is where most of these were composed. I make no special claim for the following palindromes; I only assume they're among the world's worst. Judge for yourself!
Niagara, can I evade Dave in a car again?
Lear sits; I serenade Dane, resist Israel.
Amen. I can abet arts, acid. I castrate, ban a cinema.
Rats on rope tarnish sin, rate porno star.
To drab, Alanis - O, to sin, à la Bardot!
Ana, I'd repel it per reptile, per Diana.
"Rot ! An' I mull; I dwell, Lord -- a no-sided, ere 'B' bulb, dooms Anna's mood !" blubbered Edison, a droll, lewd illuminator.
A Santa, rats, detonated a cadet - a noted star - at NASA.
I know Evita covered nude tots, tango'd ado, gnats toted under -- evocative wonk, I !
Tops! God's mad dash trowels in an isle worth Saddam's dog Spot.
Ed, Al, Gail, had detail of Xena 'n' I in an exfoliated Dahlia glade.