“Not in my back yard” (NIMBY) is characterized as behavioral opposition to proposed change and reflects vested interest and perceived negative personal consequences. The present research examined the role of arousal in moderating the relationship between vested interest and oppositional behavior. Two studies replicated previous research with high vested interest associated with greater oppositional behavior and greater attitude-behavior consistency than that observed with low vested interest. Moreover, a misattribution of arousal manipulation (Study 1) resulted in reduced oppositional behavior, whereas an induced arousal manipulation (Study 2) resulted in greater oppositional behavior. These results provide experimental support for the role of arousal underlying vested interest and behavioral opposition. Implications of the results for applications and further research are considered.