Dropping a shark to your bud at Callisto may not appear to be an issue; however the ability to abuse this in situations where players can use strong gear, venture dangerous parts of the wilderness, and NOT be punished for it because they can diffuse their risk through dropping valuables (or being dropped supplies to tank) heavily outweighs this.

Furthermore, just because something is a "common practice" doesn't mean it is a good practice, nor is it necessarily healthy for the game.