There's value in being discerning about one's fears, and it's probably best to get a handle on the less justifiable ones before sending the state after people.
Children shouldn't be afraid to walk down the street because it is filled with zombified addicts.
We don't allow public nudity, hate speech, etc etc.
You should be allowed to do as you wish in your private residence, as long as you are not harming society.
Are we going to enforce public drunkenness laws too?
If public drunkenness was an issue and we had drunk people causing public safety issues, than yes, we would enforce public drunkenness, but that doesn't seem to be the issue.
How does someone injecting drugs openly harm the quality of life for others? I can see it for the other things you mentioned.
Is it just, "I don't want to see that"? Because there are many things I don't want to see.
Not saying we shouldn't throw people in jail for drug possession. I'm OK with that. But if you're going to criminalize injecting drugs openly, you've got to live up to the fact that you're not a libertarian anymore.
You can say "oh well just enforce public disorder laws" and I actually agree with you, but the same groups behind drug legalization do not.
I spoke at the Portland city council hearing on this issue on Wednesday and the majority of groups there were criticizing the city's approach to removing individuals who were leaving needles or blocking sidewalks or setting up drug tents on school property.
The drug legalization is a dog whistle for what they really want.
Ultimately it's more a property rights issue imo.