dropped....

theres no way you could tell if it has only been a few days, unless you did a hardcore trackday in between or something.

That's not true. You can tell where the tire is scrubbing by just looking at it - the pattern and direction of the scuff will change.

If its wearing the inside that means you have too much negative camber from lowering it. Depending on what springs you went with you might not need aftermarket CC plates, but I would recommend them anyway, it's nice being able to add more caster while keeping the camber the same (greatly can increase steering feel).
 
yeah, if your just driving it to work and not pushing it i can see how that would be true but who drops their car and doesnt push it thru the turns... i have yet to align my car since putting the prokit on and my tire wear s just fine... i guess i push harder than most.
 
Everyone talks about camber when they see uneven tire wear. Yes excessive camber will cause uneven tire wear, but toe is much more critical and will cause rapid uneven tire wear if not correct, because your tires are actually dragging sideways instead of rolling straight ahead. When you lower your car, you get toe out. It's a must to get your alignment done after lowering, especially anything more than a 1 1/4" drop. Toe in will cause outside tire wear, and toe out will cause inside tire wear. The tires may also show signs of feathering. If you don't get an alignment, and your tire wear is ok, your lucky.