Good for them! I wish I didn't have to pay my agency fees so I'm jealous!
The union can choose to enforce the law or not but the law states they can take union dues even if you aren't a member.
Not quite. Maryland is not a "right to work" state, but you can not be forced to join a union and if you choose not to 'join' you can not be forced to pay dues. An Agency fee, is only a portion of the dues paid by members and for that portion you get to be covered by the negotiated CBA as far as wages pension and benefits are concerned. Most Union constitution provide for non-member rights and responsibilities. Some of the benefits you might loose by not joining would be not having the right to vote on whether to accept a negotiated CBA or not, the right to representation above a certain level, typically mid level management.
One fact about unions that the typical american worker has forgotten is, A union is just that a group of workers that has joined together to create a better work environment. Its not just about better pay but better treatment.
Know your rights, research your options and make the decision to join based on what will work best for your family or individual situation.