Paying $100 to invoke your 2nd amendment rights in Massachusetts in a form of a firearms license is the same as paying $100 for a license to enable your other constitutional rights. Imagine if all of a sudden Massachusetts made a law making you pay $100 for a free speech permit or a fee to immunize you from unlawful search and seizure, or a fee for a license to allow free assembly (oh wait we have already have to pay for that now too) damn, socialism can really be a drag.