I pity the fool who thinks most of WoW's player base knows who Mr. T is.

The official comment says it all:

William Shatner, Mr. T, and Verne Troyer (coming soon) are asking, in a series of national television commercials: "What's Your Game?" The answer, "fool", is World of Warcraft...

You can see streaming versions of the commercials at the WoW community site.