In some places, particularly at college dormitories and schools, students set off fire alarms as a prank or simply because they want to (out of anger, curiosity or revenge). These false alarms can convey a risk to alarm fatigue if they occur repeatedly, causing occupants to dismiss the importance of alarms or ignore them completely. In areas where false alarms are a recurring problem, pull stations may be covered with a clear plastic cover (sold under the "Stopper" trade name) that will cause people to notice the person by sounding an alarm when tinkered with or opened, creating focus on the fire alarm. Because of these and other issues, setting off a fire alarm when there is no fire or other emergency is illegal in most jurisdictions.