It's always the quiet ones.
If you haven't cottoned on to what's wrong with that, here's a hint: The victims' families are still alive! And lo, they aren't thrilled about jump-scare peddlers using deceased loved ones as props. (And at $30 to $60 a ticket, wildly profitable ones.) To really rub it in, some houses are specifically focusing on local killers, just to make absolutely certain that someone will stumble upon their worst nightmare.
For example, a Sacramento house tried to cash in on the local notoriety of Richard Trenton Chase. For those of you who didn't live through Chase's serial killing spree, the short version is that he killed six people.
Then he mutilated and ate them.
Among his victims was a pregnant woman whom he shot, killed, stabbed, sexually assaulted, and drank the blood of, in that order. And her husband was the one who found her when Chase was done. So you could imagine the husband's horror when he found out that 36 years later a local entertainer was selling tickets to staged re-creations of his wife's murder. The only good news to come out of this story is that the Sacramento house shut down their fun little show when the victims' grieving families complained.