Interpersonal relationships can become 'interesting' during this period, but deliberate vandalism would be self-selection for redundancy and possible criminal action. Management become very 'correct' - to the extent of external 'consultants' sitting in on meetings and taking notes - and you can bet on morale being significantly impacted during and for up to a year after a long consultation.
As pointed out below, the consultation period is before those being made redundant are (officially) selected. In large organisations - for extra fun - you have things called 'redundancy pools' based around areas of work or grades that all share a risk of redundancy but only (e.g.) 5 out of 25 will actually be made redundant. I should also point out that larger orgs often offer voluntary redundancy at enhanced terms within given 'pools' - unions where they exist will often bargain for enhanced terms.
Not a pleasant time but does give people weeks/months to find something else and take what financial precautions they can - and perhaps decide that 'VR' (voluntary redundancy) is possibly attractive. Yes, you do lose good people sometimes.
