BlakJak wrote:... yet you choose not to explain it. Speaks volumes...
There are plenty of reasons people choose to do it, I can't personally speak for everyone but my guess would be the two main reasons would be as Lanius said, purely a cosmetic thing (although why you'd bother on a Caldina I don't know as the rear is ugly as sin anyway) and the other reason would be trend.
Other reasons would include as others have mentioned panel work (Rust, accident damage etc), Thieving bastards have either walked off with them (or broken them in an attempt and no badge looks better than a broken one), Hell, some have even taken them off just to confuse onlookers, especially those that have done front end swaps or have a dramatic kit.