("Something about having all these ideas in one place makes the whole less than the sum of its parts.", "Ideas are better in the wild. Let's discuss them as they come up organically, rather than try to organize an idea-fest.")
People often point out existing solutions, so that's useful. Restricting it to a single account and once per month avoids the other problems of those threads.
I know that halfbaked covers some of the purpose, and there are probably reddit sub-reddits that do similar things, but still, and HN version would be good.
Will check out halfbaked, haven't heard of that. There's a subreddit /r/somebodymakethis which has occasionally had some interesting ideas (it led to RES) but there's probably better options.
There was a HN styled forum posted a while back too, (found it in the comments) http://firespotting.com/ - but it's definitely less active and a smaller community.
From their 'About' page: "The Buy Nothing Project began as an experimental hyper-local gift economy on Bainbridge Island, WA; in just 8 months, it has become a social movement, growing to over 25,000 members in 150 groups, in 4 countries. Our local groups form gift economies that are complementary and parallel to local cash economies; whether people join because they’d like to quickly get rid of things that are cluttering their lives, or simply to save money by getting things for free, they quickly discover that our groups are not just another free recycling platform"
I wouldn't be as inclined to gift something to a stranger as much as I'd be to grab something along for someone nearby. I don't need to be reimbursed for the effort, but I also don't want to loose money on it.
An aim of BNP is to build a hyper-local community where people give and receive goods and services with no money or bartering involved. You get to know the people involved in your group, because only people living within a certain area are allowed to be in the group. And yes, groups do indeed have people picking up things from stores for each other, or giving them rides, on occasion. Some groups including informal lending libraries, where you can borrow tools, equipment, household items an no charge.
Around here on Bainbridge Island, you often see tables on porches for BNB'ers (Buy Nothing Bainbridge members) to pick up stuff. The things (a garlic press; a pair of pants; a lawnmower) will have been listed on the group's FB page, probably with a photo, then there'll have been a few people saying they'd love to have it. Sometimes things go first-come, first-served; other times people get randomly selected.
Can't remember where I heard of this (maybe here), but apparently assembling Ikea furniture was a popular task ^^