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It may actually prevent tampering if the tampering is supposed to remain undetected.

Just look for the dude with glitter on his face.

In all seriousness: glitter gets everywhere. Something I learned in a non-security context....

You can (by means) embarrass / frustrate / reveal undesired examination / tampering of possessions by placing one or more "glitter bombs" in them. A sealed bag, container, envelope, etc. Use different colors to reveal to you just what was accessed.

glitter <nailpolish> !

It has to dry eventually, glitter falls off.

That's a stretch, and there's no mention of that in the article.

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