Rolls Royce sightings are extremely scarce in Denver. After the first glimpse, the eye scans the immediate surroundings for tycoons, starlets and/or a gloved butler prepping his chamois for a loving buff. Seeing an unattended Rolls is even more rare. And, when that Silver Shadow sits before an open garage door, the eye is even busier casing the space for loosely anchored luxury items. With all that furtive glancing, the feverish passerby of this Montclair home can't miss the warning sign posted above the trash barrels on the fence next to the garage. Banish the thought of some snarling guard dog. Beware of the (capitalist) pig, whose bite is always worse than its bark.