Re: Let them Know
@sferguson1001: I'm not a lawyer, so I can only answer your questions anecdotally. Based on some of the other comments here and conversations I've had off hte record with people, age discrimination is extremely difficult to prove in court and even more difficult to win such cases. if harassment is added to the mix, it does become a bit easier as harassment laws are somewhat tougher. Even then, though, it can be expensive and painful for the claimant. The most egregious cases are often settled out of court because a company will want to avoid the bad PR of a lawsuit.
The more cut-and-dry one's situation is, the easier it is to handle. For example, let's say you are an IT employee aged 50something, and you have a 30something colleague who is constantly harassing you and making disparaging age-related comments, creating a hostile work environment. In that case, if you have an enlightened manager and HR dept, you can file a complaint and be protected by anti-harassment laws.
However, what I'm seeing and hearing about is more of a systemic ageism that pervades the entire tech culture, and that is something that is extremely difficult to prove in court.