Now seriously:
1. These lights are simply not bright enough.
Standard "ultra bright" LEDs are no match to incandescent bulbs.
2. They draw the wrong kind of attention.
Cops will notice them, but soccer mom in the minivan behind you will not.
3. Integrated turn signals are not noticeable enough.
Also check point 1 again.
4. You do not have to sacrifice safety to get chicks to notice you.
In the end, LED is good, but take the right LED and do not
jeopardize light's primary function - to signal your position,
action and intent clearly and brightly.
Here is a comparison between 24 LED "ultra bright" cluster
bulbs and single LED 3W Luxeon bulbs.
Pictures were taken with fixed exposition and aperture to
avoid undesirable automatic light compensation.
Draw your own conclusions:
http://picasaweb.google.com/vladpic/LEDBrakeLight