THE worst "Classics"?
Most of the books I was forced to read in High school as a "compulsory reading". Quite a few of those were written by our national writers with a single thing in mind: to promote ideas endorsed by our Communist government, such a collectivisation.
If you want to see what I am talking about, try
Majakovskij
http://en.wikipedia.org/wiki/Vladimir_Mayakovsky
or another gem:
Как закалялась сталь,
(How the Steel Was Tempered) by Nikolai Ostrovsky
http://en.wikipedia.org/wiki/How_the_Steel_Was_Tempered
Some books by Nikolai Ostrovsky -
http://www.gutenberg.org/browse/authors/o#a2619
Also, do not forget Maxim Gorky
http://www.gutenberg.org/browse/authors/g#a348
and Anton Semyonovich Makarenko
http://en.wikipedia.org/wiki/Anton_Makarenko