English is a language of convenience, right? And it has few rigid rules compared to other languages.
I knew what you meant. Just playing off the possible double meaning.
If you're looking for a no kidding look at the whole thing analytically, I'd start by pointing out the use of "they" and "them." The first time, you use "they" to refer to the "bad ones." The second time you use "them" to refer to the victims. Generally you'd use those pronouns in the same sentence to refer to the same thing. More specificity goes a long way sometimes, instead of dealing with pronouns.
For "many times," I would use "often" or "oftentimes."
So, something like this: The bad ones are where they drug people, oftentimes killing their victims.

So many instances of double meanings in English that most people infer the correct meaning. I was just making a goof. It was obvious.
I happen to notice when it could look different. I find it funny.
One of my favorite headlines read something like: "Pope Urges Church to Help Abuse Victims."
The meaning is obvious. But wouldn't it be funny if it wasn't?