Fair point, however your argument has many flaws,
1. If you're a stealth whore, make it unique side view, so you can see friendly stealths but not enemy, or no stealths at all.
2. Add a 3-5 seconds lag, would NOT be hard, 3-5 seconds + the minimum of 2 seconds on ventrilo or other VoIP style voice chat would mean an 7 second delay removing all advantages.