Which signal misuse reflects negatively on a driver's skills?

Failing to signal when necessary reflects negatively on a driver's skills because signaling is a fundamental aspect of safe driving. Proper signaling communicates a driver's intentions to other road users, which is essential for preventing accidents and maintaining smooth traffic flow. When drivers neglect to signal, they can create confusion among other drivers and may be seen as irresponsible or unskilled, as they are not effectively communicating essential maneuvers such as turns or lane changes. This oversight can lead to dangerous situations, making it a clear indicator of a driver's lack of attention to basic driving practices.