Overwatch has similar issues - common advice for playing Competitive is to just completely disable text chat and voice chat. Yeah, you'll miss genuine, helpful suggestions, but they're a tiny, tiny minority of messages at the lower ranks. Not that it necessarily improves a lot at the higher ranks, as I understand it, but is less awful.
I don't play a lot of competitive Overwatch, but it's definitely a much nicer experience with chat turned off, even if I'm not the one being flamed, even if we lose because people are typing instead of shooting.
The biggest issue is, of course, (4) - how do you plan on enforcing that for sites that don't run out of your country of residence? Implicitly restrict access to only those sites in said country?
Even then - I have a reasonably nice Brother Printer/Scanner/etc device, and I could never get AirPrint to reliably work until I switched over to using Ethernet instead of Wi-Fi. Something to do with it going to sleep and not broadcasting the necessary mDNS stuff, IIRC. I couldn't find any combination of settings in the printer to make it happy, and since it's now right next to a switch, it's not really worth the effort of digging any further.
The Java one can actually be quite helpful, for a couple of reasons:
1. It tells you which variable is null. While I think modern Java will include that detail in the exception, that's fairly new. So if you had `a.foo(b.getBar(), c.getBaz())`, was a, b, or c null? Who knows!
2. Putting it in the constructor meant you'd get a stack trace telling you where the null value came from, while waiting until it was used made it a lot harder to track down the source.
Not applicable to all situations, but it could be genuinely helpful, and has been to me.
When spoken? Almost certainly. But I think they mostly write in Hochdeutsch, especially in formal contexts, at least that I've seen (private chats/etc are a totally different matter), so I don't foresee any major issues there.
They really are very, very different. Knowledge of one helps with the other, but it's far more than just "a couple of weeks to adjust to the accent", for example.
EDIT: It's worth noting that this is mostly a spoken thing, AIUI - most formal/semi-formal writing would be in Hochdetusch rather than a local dialect.
I don't play a lot of competitive Overwatch, but it's definitely a much nicer experience with chat turned off, even if I'm not the one being flamed, even if we lose because people are typing instead of shooting.