"I'm a doctor of medicine. Don't worry guys. The treatment for anthrax is well-established. These guys would have to genetically engineer the strain to defeat the newest antibiotics. I don't think they can do that. It's hard for our own biotech companies to do that. If you start freaking out, it will drive up the cost of the drugs. It's better to use these antibiotics judiciously. If you over use them, the germs themselves will become modified through the natural mutation process. It's better to NOT use the antibiotics unless you absolutely have to. OK?" My late mother was fond of saying that there's nothing common about common sense.
Your advice, while techincally accurate, is completely worthless, because by the time you "know" that you need treatment, it's too late to start treatment. When the first symptoms occur, you are the walking dead.
You're wrong. There are several different types of anthrax. The timelines for when you must initiate treatment vary with the exposure level. You are hyping out and you've not even been exposed. Don't let a terrorist psyop confuse you.