An initiative on the ballot next week has Denver voters deciding whether to legalize possession of a small amount of pot for those 21 and older.

The campaign has caused an outcry, not only because it’s controversial but because critics say it’s misleading — the M word — marijuana — isn’t mentioned in billboards and ads for Initiative 100 and it’s promoted as an effort to stop domestic violence.

“To say that if you smoke a joint, you're not going to beat your spouse, but if you drink beer, you will …it's a real reach to say the least,” said Denver City Councilman Charlie Brown (search).

The billboard advertising the pro-pot initiative, which bears an image of a battered woman with her abuser lurking behind her and says “Vote Yes” to end domestic violence, was eventually scrapped after complaints from anti-violence advocates and city leaders.

Supporters of the effort say it’s important in a society that demonizes pot use but approves of alcohol consumption.

“The first step is to stop arresting adults and stop sending the message that alcohol use is acceptable and that the use of something less harmful isn't,” said Mason Tvert of the Pro-Marijuana Initiative (search).

Funding for the ads has come from a Massachusetts group called Change the Climate (search), which has conducted similar inflammatory campaigns across the country. None has been successful so far — but they certainly do get attention.

Click in the video box at the top of this story to see a complete report by FOX News' Carol McKinley.