Here's another possibility: addictive behaviors. Addiction is, generally speaking, a compulsion to partake of some behavior with disregard for costs associated with the behavior. This can be extended to include a disregard for potential signals sent by the behavior, in much the same way that someone who is sufficiently hungry will desire to eat with no regard for signaling.

Given what AdeleneDawner reports about experiences with non-signaling, I wonder if part of the reason for the (sometimes apparently disproportionate) social stigma of addiction stems from the blatant disregard for signaling displayed by addicts?

For instance, it seems to me that someone who makes consistently bad decisions with an awareness of signaling is less likely to suffer additional social penalties than someone who makes similarly bad decisions as part of satisfying an addiction.