In the early 80's, when IRA bombs were commonplace on mainland Britain, there were often many false alarms and hoaxes that went along with it which kept members of the public vigilant.
Here is an example of one of the more amusing false alarms...
In a generous act of philanthropy one day, local musician, Mike Kane, gave away free packages to the public, containing a music cassette of his band, AAGA, along with some other gifts inside... just like wee lucky bags. One of these packs was dropped off at the Wellgate Library. A little later, one of the observant librarians spotted the package sitting there, thought it might be a bomb, and promptly called the cops. The Wellgate was evacuated and the suspect package dealt with.
A few hours had passed when Mike was visited at home by the boys in blue (he kindly left his name and address on the explosive devices!).
The police commenced questioning him about the incident. Mike's tape recorder was running at the time and managed to capture the conversation, the transcript of which (above) was published in the first issue of The Voice.
You may need to click on the image to read the large version.
AAGA - louder than a bomb!!