The same thing you do with RSS/Atom feeds. They don’t magically disappear unless they’re deleted.
If you mean you think they would get buried under regular human tweets, you can make a list. I have a news list for this.
Sure, De Raadt/OpenBSD are bitter about the lack of funding but that does not explain anything about this mysterious hole.
This email can mean anything. Does Kirk McKusick know about this hole and has he pressured De Raadt not to disclose it (for what reason could that even be?), or is it a vague reference to a fallout he had with him earlier(making this an absurdly petty reason not to disclose it)?
Just dropping that hint is ambiguous drama baiting.
It really does seem like De Raadt's just being really petty to me. But if this is an actual hole and he doesn't want to say what it is, that is worrisome. Doesn't he insinuate the rest of FreeBSD does not know about the hole?
It's possible that he knows of a real exploitable problem.
It's possible that he is trying to boast about his prowess with things "security".
It's possible the "hole" is a design feature in FreeBSD that he just doesn't like. (And hence, considers to be a security problem.)
It's possible that he is bitter that FreeBSD has gotten more attention than OpenBSD.
It's possible that he said it to spur FreeBSD take more interest in security. (Justifiably or not...)
It's possible that he wanted to cause a commotion.
It's possible that more than one of the above is true. :) He is under no obligation to make a disclosure of an exploit that he finds. Does it make him a bad net-denizen? Perhaps. But it's his prerogative.
I had a look at their site, but the MX[1,2,3] phone doesn't seem too special in design; it's an iPhone clone like so many others at first glance.
Is that just the English market, maybe they have other phones as well?