I notice these all the time, and I'm sure I've used some canned phrases myself. I've sometimes attributed this to different language proficiencies--posters who do this tend to seem like non-native English speakers. Or yeah, I guess they could be bots.
Oh definitely - I'm sure I have too. It's the combination of the three phrases that raises my suspicions - I've no problem with people saying "that is good" as a general rule!
low value and/or spammy posts are not ok even if they're on-topic so report them if you think they're low-quality/spammy. though I can't guarantee that the mods will agree with you. I've reported multiple accounts for spamming low quality one-liners once and they kept on doing it (but it seems they've improved over time.).
I shall report, then, and be damned!
Thank you both for your feedback - I don't like reporting posts for the sake of it, thanks for the second opinions before I summon the mods!
You can add a link to this thread in your report, that should help.
I've noticed this brainless posting style before, never thought it's so widespread though.