Burning, The (1981) 

a.k.a. 

Disabilities:  Burn scars

Comments:   The caretaker of a summer camp who has suffered disfigurement through a prank by campers leaving him badly scarred by fire returns to wreak vengeance.

http://www.imdb.com/title/tt0082118/

http://www.allmovie.com/cg/avg.dll?p=avg&sql=1:7595