How to get Aspell to not suggest profanities

Dear All
 
Here at VUW we make use of the Aspell software to provide spelling corrections / suggestions for the Library Catalogue.
http://victoria.lconz.ac.nz/
 
Sometime when users search for a legitimate word Aspell would suggest a profanity.
 
For example Cnut (England's Viking king) ; 'hispan? cuentes' and 'FCUK' all produced some profanities in our implementation of Aspell.
 
In the past I just added the word that produced the profanity to custom dictionary. Aspell would of course now see these words as legitimate and not suggest a profanity. To do this effectively I need to know what words are likely to produce profanities, which in the long run is not a good proposition.
 
So, is there a switch that one could use to turn of the profanities?
 
Kind regards,
 
Skalk
 
Skalk van der Merwe
Systems Support Librarian
Victoria University of Wellington
www.victoria.ac.nz/library