Lots of misinformation here (no offense intended to the posters - legal stuff is complicated).

1. It is okay to make a U-turn at a drunk driving stop (at least in California and certain other states). In fact, they are REQUIRED to have an "escape route" as part of the check point, and they can't use someone's choice to "opt out" as reason to stop them.

2. TSA employees, as private citizens, have the right to hold and detain someone who they suspect of a crime (but, in most states, it needs to be a felony). HOWEVER, as a matter of DHS policy, TSA employees are *not* allowed to arrest, etc.

3. As noted by some posters, sexual assault type crimes just about always (I don't know of an exception, but I have heard there are some, I would appreciate a post of details) require a desire to obtain sexual gratification. Indeed, if you touch someone else on the elbow (an example of a non-typical sexual portion of the body), with the intent to obtain sexual gratification, then it is a sexual assault, at least in California.