When reviewing or commenting, you can only judge by what is actually said, not by intent. (This is something most politicians have yet to learn.) On the other hand, some people will take offense at anything. A long, long time ago, well before the days of the internet, I had a rep in a small fandom for giving straight criticism. Lots and lots of people asked me to crit stories, but not because they wanted that detailed critique. What they wanted was to be able to say, "Lil thought it was wonderful." If Lil didn't, it was time to climb into their huff.