Here are a few simple rules to comment safely
1) Make your comment relevant – this means you need to comment on what the post is actually about, not anything else (e.g. what the blog site looks like!)
2) Be positive in your comments.
3) Comment on whatever you like – ask questions, give feedback, suggest what you might do if you were doing the same thing as the blogger.
4) Check your spelling and punctuation – no ‘text-speak’!
5) Only leave your first name.