How you can avoid giving me a flesh eating disease

Why shouldn't you you just take some old anitbiotics that you have laying around the house when you don't feel great? Oh, let me count the ways...
First of all, you shouldn't have it laying around the house. You're supposed to take all of it when the doctor prescribes it to you...even if you feel better. You know why? Cause if you don't, you help to strengethen and spread drug resistant bacteria. Which makes it that much more likely that I will get some sort of drug resistant, flesh eating infection.
How do you know that what you just took is appropriate for whatever you may (or may not have)? You don't. That's what you pay a doctor for. Also, if you use a drug for no reason you're giving the bateria another chance to develop resistance. Sensing a pattern? Me having flesh eating disease?
What if they're old or expired? That's just nasty.
If used incorrectly or incompletely (as you've already done once), you contribute once again to drug resistant strains of bacteria, giving me flesh eating disease. Or Joss Whedon. And if you give Joss flesh eating disease, I will eff your day up.
Oh, no matter how much you want it to, antibiotics WILL NOT KILL A VIRUS.
Please, stop being an idiot and thinking that you know enough to self medicate, thereby giving me the inevitable FLESH EATING DISEASE. Seriously, though, if you are doing this, you are most definitely part of the problem, and its making me crazy. Way to cause the plague, genius.