[k_sh]

> Giving someone 0-day notice and physically escorting them out of the company is simply unacceptable.

This is a pretty common practice, especially when dismissing employees that work with sensitive information (e.g. architecting trade secrets), or work in public-facing positions (e.g. spokesperson or PR). It avoids the risks found in the question of "what will this person do when they know they're on their way out?".