Where I come from negative feedback even when meant constructively (also know as bitching) is highly commonplace and while I grew up I didn't mind it. But what I've experienced over the years, especially from voluntary/community based activities and projects -- especially when there is no face-to-face interaction -- has proved for me that it is very very rarely constructive at all. Unless you are really sure that not only the person you are giving the feedback to but also all others that read the comment find such tone constructive.
Yes, this specific comment fueled discussion. But even I (with background as noted above) was a bit taken aback by the comment. Not only by the tone of it but also because I think it was simply unjustified, missing some important points. Let me explain:
I came to these forums today after I had stumbled upon an interesting sequence bit of four photos that have been stitched into a sequence by Mapillary where in fact only the first and the last of the four are from the same sequence. In other words these 1, 2, 3, and 4 photos could have been taken independent of each other and they would still have been stitched into a sequence. I wanted to post this finding to some thread that I thought would been something like "Neat technical things in sequences" -- but this is a good place for sharing this.
To contemplate the above, using the terms / point of view above I could have taken four independent sequences with 6 or 8 second interval and they would still have ended up as a sequence. That to me is a pretty amazing example of how powerful the system already is. Just imagine what can be done in a few years! Old "useless" photos become as valuable as anything. Except that they already are.
Finally on commenting how something is sub-optimal I think it's always a good idea to remember that not only it is a by-and-far mainly a voluntary activity that people are taking all the photos that they are for uploading to Mapillary but also that the technology we have (literally) at hand is (highly) sub-optimal in itself. Talking about sequences the storage space that many have is highly limited. I happen to have a Galaxy S5 with a 128GB SD card in it and won't ever again run out of space when capturing. But many don't have that luxury. I always think of the poor iPhone users and others without any external SD card when talking about this. You get the idea.
Last but not least, snapshots here/there just like many of the "bad quality" photos can be immensely useful for many purposes -- even if they could never be stitched into a series (which they will eventually but anyways). I just wrote about this quite extensively in the Better than nothing thread.