I found it odd that this question Were the snowflake photos said to be taken with a compact camera + reversed SLR lens really taken that way? (which isn't mine) picked up a number of downvotes. And I've seen similar elsewhere in SE where the person is asking about something and get downvoted if they're in the wrong even if they state plainly that they're unsure.
Is there some SE etiquette I'm missing or is it others misinterpreting the voting system?
Surely the right thing to do is upvote a well written question and then upvote the answer which points out that they've got it wrong, and explains why (which a number of answers to that question do...)