the Oosterschelde damned?

Demonstrations are sometimes spontaneous gatherings, but are also utilized as a tactical choice by movements. They often form part of a larger campaign of nonviolent resistance, often also called civil resistance. Demonstrations are generally staged in public, but private demonstrations are certainly possible, especially if the demonstrators wish to influence the opinions of a small or very specific group of people. Demonstrations are usually physical gatherings, but virtual or online demonstrations are certainly possible.

Sometimes, particularly with controversial issues, groups of people opposed to the aims of a demonstration may themselves launch a counter-demonstration with the aim of opposing the demonstrators and presenting their view