Just to set the record straight, in a totally unbiased fashion;
ig·no·rant
–adjective
1. lacking in knowledge or training; unlearned: an ignorant man.
2. lacking knowledge or information as to a particular subject or fact: ignorant of quantum physics.
3. uninformed; unaware.
4. due to or showing lack of knowledge or training: an ignorant statement.
The many references of people being "ignorant" by choosing to use proper spelling / grammar, does not make a bit of sense whatsoever.