Got my first thumbs down on a review of a small, not-so-great 9er at a high school.
Not quite sure why but I guess it's bound to happen eventually. I'll still keep on truckin' and reviewin' though.
Maybe a fiercely loyal Fond Du Lac alum?
Seriously, school courses are hard to write about. They're generally pretty dull, and as you note, not for experienced players (only baggers). Some people take offense at that kind of criticism. You just have to look at your review, and probably just shrug it off.
I've looked at a few of my reviews that drew downvotes and honestly, I had to admit they came off as a little dismissive of the course. So I did a little editing (just the tone, not the facts) and moved on.
The advantage of being a paying member here is that you can see who votes on your reviews (for just $15 a year). I have contacted some of my negs in the past, and asked them how I could have made the review more helpful.
A few gave me good feedback, a few said they voted by accident, most didn't answer.
And finally, some of them are just homers who, I guess, react when reading anything but praise about "their" courses.
The best advice is what you've already received. Consider it the price of doing business, know that you can't please everybody, realize how easy it is for somebody to simply push the "Not Helpful." Keep writing - I enjoy your reviews.