I bought my car with a trunk spoiler, and I like the look, but I concur that I would not drill a nice trunk lid to install one. Tastes change over time, and five years down the road you might wish it was not there, then what do you do. Or you might want to sell the car next year and the spoiler might decrease the value, especially if it's installed incorrectly.

I would not think twice about installing a front spoiler though. they take care of front end float big time.