Often a claim is made that a product has been contaminated when really nothing has been done at all. These hoaxes are often as effective for economic sabotage as the real thing. 1.3 - Windows and glass Plate glass windows found on shops etc. are not cheap. Destroying them is an effective method of economic sabotage. The same is true for vehicle windows which are also expensive to replace.
Windows are also possible means of entry into buildings and vehicles.
Burglars and activists involved in Animal Liberation are quite adept at breaking windows in a numbers of ways, each with advantages and disadvantages. As used by burglars. A blow torch is used to heat a windows glass before a cold water is applied, for example, with a damp cloth. Masking tape and sticky paper During the blitz in the second world war, people put masking tape on their windows. They did this to prevent the glass from shattering everywhere if a bomb blast should occur nearby.