My point is not that this is okay [0]. My point is that FSF is claiming "Google is doing this on purpose and this link says so", and YOU said "this link says so", and that's not what that links says. So stop making shit up. Stick to what you know, and/or to your opinions.
FSF could have avoided my complaint by changing "According to this thread, Google is doing this on purpose" to "Based on this thread we're guessing Google may be doing this on purpose". You could have avoided my complaint by leaving your whole last sentence off.
[0] Supposing that this IS what's happening, I'm not defending it (nor opposing it, I'm not forming an opinion). But as a side note, my understanding is that nearly all email providers DO do this thing for email; if a given domain is spamming hard enough, eventually email providers start dropping mail silently. Don't they?