Here's one that isn't always considered ambiguous, but probably should be, given what is known:
"Many sex offenders say they are addicted to pornography and that pornography influenced their crimes. Pornography causes sex crimes."

Is that the sort of thing you're looking for?

Here's are some related statements:
Many sex offenders say they are addicted to pornography.
Many sex offenders say that pornography influenced their criminal behavior.
Pornography causes sex crimes.
People predisposed to sex crimes may be more likely than average to look at pornography.
People predisposed to sex crimes likely have poor impulse control and may consequently be more prone to addiction.
People are often more comfortable blaming influences than accepting responsibility.
Many people who enjoy pornography do not commit sex crimes.
The rate of reported sex crimes is higher in areas with strict laws controlling pornography.
People may be more prone to commit sex crimes in sexually repressed environments.
People may be more tolerant of sexual offenses if they are exposed to pornography.