What does the tag #iamthemob mean on Twitter?

A group of ignorant gun-toting right wing nut jobs that think screaming at and threatening politicians counts as "debate". This group inherently hates healthcare reform, mainly because they know nothing about it except the lies Glenn Beck and Sarah Palin tell them about it.

People who interpret the United States Constitution like the Founding Fathers intended.

Princess Pelosi's un-American, Nazi loving, astroturfing, mob- the bane of her existence. You know- the assertive, articulate, respectful, intelligent Americans who peacefully make their opinion and objections known to their elected representatives.