Sure. Thousands do. But if the employer had fewer than 15 employees, it will properly ignore your charge.
Discrimination is a noun so doesn't have any tenses. The simple past and past participle of discriminate is discriminated.
Absolutely. There are very few rejections made during the hiring process that are illegal, and those have to do with discrimination against protected classes - such as minorities, religious groups, etc. Unfortunately, "people with many past jobs" is not a protected class.
"Filed" is the past tense of "file".
Affirmative action was designed to address the effects of past discrimination.
The government doesn't care. You owe the taxes and they expect you to file. Others in the past have gone to court with this issue and lost to the government. Better file.
A past employer may give a prospective employer an overview of the employee's employment record. They can give their opinion about the employee's character.
yes
The straight forward answer to this is that discriminating against a person because of their sex fits the question. In some circles the question relates to simple "What is sex discrimination?" Now in the past few years society is faced with people who openly say they are not sure of their "gender" or their "sex". They do not consider themselves necessarily as "Gay", they simply aren't sure. If these people are discriminated against, it is also gender discrimination.
Affirmative action was designed to address the effects of past discrimination.
the underclass
In the past people were discriminated against because the their race, religious beliefs or sexuality, unfortunately this discrimination still goes on in some parts of the world.
You should consult an attorney. Your only recourse is probably to file suit for defamation of character, if the allegations are, in fact, untrue.