Nobody is making the claim that the URLs are non-existent, simply that Google has not indexed them. I'd imagine a lot of copyright infringing file sharing sites have a robots.txt that blocks Google et al to keep them under the radar.
It really depends on the algorithm. This is apparently about the type of language used, not the opinions expressed. If the algorithm mostly removes one word replies like "Fucktard", and leaves in place "I respectfully disagree with you that Mr Trump's policies will have the effect you describe", then, well, it's fine. What's the problem?
What I find interesting right now is that the word "Toxic" is used to describe the kinds of comments that'll be removed, and immediately rather a lot of people on Slashdot (not you) immediately assume it's anything that's anti-StrawJW.
Kinda tells you something about the people who use the term "SJW" to describe opponents of their own beliefs, doesn't it.
What happens is that when people don't get punished for the first few things, they start to realize that the normal limits don't apply, and the bad sorts start pushing the envelope. Eventually
beat an underperforming employee's head in with a baseball bat
Everyone knows that only liberal protesters at places like Berkeley and anti-Trump events are allowed to talk about and do that sort of thing.
Amazon.com -> Electronics -> Printers and Ink -> Dot Matrix
Prices vary, but $200-500 seems to be the ballpark. This seems typical..
Given Go is a mainstream language without anything unusual about it, and given that's pretty much well known, I'd say most programmers wouldn't consider it a barrier. The programmers that do? Probably the people who aren't going to contribute to an open source project in the first place.
Why do I say this? Well, because you either love programming or you don't. If you do, then yes, open source is interesting to you, and no, you're not going to be put off by having to use a language you're only 90% familiar with (because, like I said, for non-LISP/Prolog/etc programming languages, you're already 90% familiar with them), you'll consider that a feature, not a bug.
What might put a programmer off contributing to a project because of the language is if the language is unpleasant or a chore to use, not if the language is not something they've used before. But Go isn't that either.
I'm a developer too. I've been in this profession for nearly 25 years, and been programming since I was 10 years old. If something can be modified and the source is available, I tend to play with it, regardless of the language. I really suspect most of us are the same way. Those who aren't... well, do you think they're really interested in open source?
Ether seemed a good model at the time and it did explain enough of the world that you could build useful conclusions when assuming it, despite it being fundamentally wrong. We may well be seeing the same thing with string theory today.
A fairly reasonable "decide that amount" is "you can have as much freedom as you want, as long as you don't deprive other people of the same freedom." That's been a legitimate social consensus for a very long time.
Quite, the same thing happened when they started to introduce human driven motor vehicles in place of the horse powered vehicles in the late 19th Century. A few lawsuits later, and nobody wanted to drive cars any more because of the risk. That's why we're stuck with horse and buggies in 2017, and nobody has gasoline or electrically powered motor vehicles.
(The concept you're looking for is "Insurance".)
I don't think real developers care. As long as it's not written in LISP or some other language that's radically different from normal paradigms, and as long as the development environment is just a matter of checking some options in their favorite IDE, most programmers will be entirely happy.
You grossly underestimate the ability of decent programmers to switch from language to language. What we care about is not whether a language is rarely used, but whether it can do what we need it to easily and quickly - and whether the libraries are easily googlelable of course.
Go is a mainstream language, if a little basic. It's fine. That won't be the problem.
Today's scientific question is: What in the world is electricity? And where does it go after it leaves the toaster? -- Dave Barry, "What is Electricity?"