If your comment is "Hi" or "that is nice" or anything that is a kneejerk reaction instead of commenting on the content then it is probably best to not comment. Although to be fair the majority of comments are shit post marketing tricks since you only go say hi , not just you but we all have I think and many do, they only say hi on posts or make some crappy you look pretty generic comment so that person can then go visit their blog. If hive is social media then we have to tolerate that trash and since they feel they are in the same league as real social media then say Hi to your hearts content until they can enforce it in the code because managing community with people can never work. code is law.