That objection seems orthogonal to the point though. The US could make it so that owning a blue shirt means you are barred from the US for life. They open up your suitcase and find a blue thread.

Ultimately it's the law itself rather than the enforcement of it that you're objecting to.

Cannabis use is considered a “crime of moral turpitude”. So it’s legality elsewhere is irrelevant to the US.

However your scenario is inaccurate. Just as having a google search about murder weapons won’t bar you for life neither will search history about cannabis. They may ask why your interested in it... But learning about a crime is not equivalent to commiting the crime.

Even just having investments in Cannabis stocks can cause a lifetime ban https://www.ctvnews.ca/canada/why-investing-in-pot-could-pos...

>Even though Znaimer didn’t admit to personally using pot, he was given a lifetime ban anyway because of his investments in U.S. marijuana companies, he said.

>In one case, Saunders said an Edmonton man received a lifetime ban from entering the U.S. simply because he was a part-owner in a Colorado building that leases space to a pot dispensary.

So what is stopping them from denying entry due to search history?

The rationale in the US law is that the crime is an equal moral failing to murder. That may be irrational to you and I, but that is the law.

Just as being an accessory to murder would be considered "very bad" so too would supporting cannabis use in any way. According to US law he is investing in a criminal enterprise, similar to funding a cartel in Mexico. The law doesn't match the common person's perception of severity, but the US border guards will enforce the law as written.

Again, none of this prevents you from merely learning about cannabis. It requires action of some sort to further the use of it.

By that logic, if you owned property that was rented by a murderer, you should be banned as an accessory to murder. It's absurd.

Its more like leasing a room knowing it was Dexters kill room. That said I'll go no further justifying US pot laws. But the failure is in the severity assigned to the "crime", everything that follows is rational if you accept the premise that it truly is akin to murder.

This is kind of thing is not new. Canada doesn't let people with DUIs enter the country. They also inspect electronics and have for a number of years.

And marijuana is not legal anywhere in the US at the moment. There are simply some states that don't have state level criminal laws associated with marijuana.