Writers should avoid broad generalizations and stereotypes. [DELETE/ REVISE]
Overgeneralizations and stereotypes are signals of immature and careless perspectives and writing. In academic and scholarly settings, writing that is nuanced is more effective than writing that overgeneralizes.
For on-line help with avoiding overgeneralizing and stereotypes, visit:
http://owl.english.purdue.edu/owl/resource/608/05/