Generally speaking, if someone is being threatened and fears for his/her safety, that person should file a police report.
It is a good idea to talk to an employment lawyer in Illinois (assuming that is where you work) about this.
I disagree with the two earlier posts. There have been developments over the last year or so that MAY allow the posts to be protected under the NLRB.
The NLRB recently ha been aggressively scrutinizing employer regulations of employees' use of social media – even where the workforce is not unionized. Even where the employee is insubordinate, complaints on a social network may be protected if the post is "concerted activity."
I have more information on it at my blog post: http://...
Every situation involving paycheck deductions must be carefully evaluated under laws and regulations or the employer may face legal consequences. Federal and state laws strictly prohibit if and how an employer can deduct from an employee's paycheck.
One such law that regulates employer deductions is the Illinois Wage Payment and Collection Act. In Illinois, for example, an employer can only deduct from an employee's paycheck if the deduction is:
-To the benefit of, and approved by, the...
Illinois is an employment at will state. Unless you have a contract, it sounds like this falls squarely within at-will employment -- where an employee can fire you for any reason or no reason at all except an illegal reason.
In Illinois, what matters is the type of job for which someone applies. If the job has a legitimate physical requirement that someone cannot meet and that the company cannot reasonably accommodate, then that condition is relevant. However, the employer is not free to troll through medical histories and discriminate against a prospective employee because of a disability or perceived disability.
Edgar is correct that you cannot be made to work involuntarily. I would note however, that the document you are calling an offer letter may be a binding contract. I suggest that you have an employment attorney review the document prior to signing it.
While we cannot read your employer's mind, sometimes employees get a bad feeling in their gut that something illegal is going on. If you suspect that you were fired or not hired (it is not clear to me which it is based on your post) because of your race or religion, you should talk to a lawyer who focuses on employment law from Illinois (assuming you worked in Illinois).
There may be discrimination, but there are not enough facts. Do you think the pay cut was because of age or pay scale? You may want to talk to an Illinois employment attorney to explain your situation in more detail and to get a better understanding of the law.