People's freedom to innovate technlogically is highly valuable, even critical, to humanity. This implies several imperatives when restrictive measures are proposed:

Assess risks and opportunities according to available science, not popular perception.
Opportunity Costs
Account for both the costs of the restrictions themselves, and those of opportunities foregone.
Return On Investment
Favor measures that are proportionate to the probability and magnitude of impacts, and that have a high expectation value.
Protect people's freedom to experiment, innovate, and progress.

Based on the Proactionary Principle written by Max More. source