I'm seeing quite a lot of low-rep people posting comments as answers and, upon receiving the corresponding VLQ reply:
This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post - you can always comment on your own posts, and once you have sufficient reputation you will be able to comment on any post.
they respond that they know this and are posting an answer solely because they don't have rep to post comments - or they definitely would.
Why do I need 50 reputation to comment? What can I do instead? has exactly the instructions on what they're supposed to do, but they never see it, and the links in the message aren't of much help.