I personally think the spoiler on the TSX looks great.
It'll be a pain to remove the spoiler, and the best way would probably be to find someone with the same color car that dosent have, but wants a spoiler... and trade the whole trunk lid with them. Once the spoiler is removed you'll have to fill the holes... which means body shop, welding, paint... big bucks (probably in the range of $500) just to remove something you paid extra for at the dealer.
If you really want to rid of the spoiler, swap trunk lids with someone that wants the spoiler.......