There are a number of reasons why situational crime prevention is not effective. First, it relies on the assumption that criminals are rational actors who weigh the costs and benefits of their actions before deciding to commit a crime. However, many criminologists argue that criminals are not always rational, and may instead act impulsively or out of desperation. Second, even if criminals are rational, they may still be able to find ways to circumvent the measures put in place by situational crime prevention. For example, if security cameras are installed in a parking garage, criminals may simply target another area that does not have such measures in place. Finally, it is often difficult to accurately predict which situations will lead to crime, and thus it can be difficult to properly apply situational crime prevention measures.