The only time I willingly do that is when I'm browsing the Web while drunk, and something about the page's behavior or design annoys me, so I'll casually open up the inspector and work out a fix.

This has happened several times and I usually end up with a nice snippet of code that's actually useful. Interestingly, I almost never do this while sober, or stoned. There's just something about drinking that makes me more eager to do stuff like that.

For any kind of work beyond that, though, I'm effectively useless when drunk.

I do it while working on side projects once in a while, but I'm usually only effective when the task is something trivial such as adding a new basic feature to a web app. It can be a lot of fun as I tend not to not overthink my code and I can come up with some creative ideas. Like many others have said when answering this question at other times, the code can be sloppy sometimes so it's important for me to add comments and make sure that I refactor.

Does anyone enjoy programming while high on cannabis? I don't think I actually accomplish that much, but I do tend to enjoy it and have solved some nasty bugs with a fresh look. I've heard mixed feelings on the subject though.

I have, but no noticeable productivity increase. It's usually just something to relax as I wind down my programming for the day.

When i was young i did that sometimes at work. Worked out pretty well except that the code was a bit hard to understand.

Yes, and not necessarily.