|Fennel gone wild.|
The most common mistake is to say that "bacteria become resistant". So, here is a quick lesson in evolutionary biology. The vernacular language tends to treat bacteria as an individual, but really, it's a population going through changes. And the basic thing to remember is: the resistance mechanism is already in the population. The treatment with antibiotics did not create resistant organisms - it simply selected for them to increase in population frequency.
But perhaps more exasperating is the frequent populist writing about "creating superweeds". Coined by antiGMO activists, superweed is a poorly defined term meant to bring up the specter of unkillable weeds. By definition, a weed is simply an undesired plant growing in an agricultural set up competing against a desired crop. The technique of engineering crops to be herbicide resistant opens up the method for using herbicides to kill off weeds - but, eventually, the resistance mechanisms will increase in frequency among surviving plants going on to the next generation. It's simply evolution in action. There's nothing super about it.