Proportionality is essential when taking measures. The guiding principle is always: ‘open where possible, protected where necessary’.
The threat and risks should be in a healthy balance with the measures to be taken. It is obviously undesirable to take too few measures. However, there may be negative consequences related to taking too many measures and/or measures that are too far-reaching too. Consider for instance the bureaucracy associated with an excess of control and distrust, or damage to your academic reputation due to excessive restrictions on openness and accessibility. The principle of ‘open where possible, protected where necessary’ provides a good summary of the importance of proportionality.