Presenting programmed angry messages to a negotiator has increased concession rates in a series of recent experiments. But observing responses to a computer or confederate counterpart cannot yield insight into the perceptions, reactions, and negotiation outcomes experienced by those who actually deploy anger as a tactic. We report five studies examining the anger expression decision using a range of different methods. In the fully interactive two‐person integrative negotiation in Study 1, expressed anger generally degraded trust while damaging implementation of deals. That ultimately diminished value actually claimed by anger expressers. In the discrete choice experiment of Study 2, sending angry messages proved costly for expressers, who registered very high levels of measured disutility from using this tactic. In Study 3, survey respondents reported widespread unwillingness to misrepresent anger during negotiation. Recalling a past negotiation, anger correlated negatively with experienced success, indicating that disutility from expressing anger generalizes widely across different contexts. Study 4 revealed that negotiators generally consider the tactic to be unethical. More than just specific beliefs about the lack of efficacy, Study 5 revealed that the source of tactical disutility lies in generalized discomfort with the misrepresentation of anger. Implications for research, practice, and training are considered. [ABSTRACT FROM AUTHOR]