I find it annoying that it requires 50 rep to comment on another post. I once asked a question and someone answered and provided a link. I tried the instructions at the link and completely screwed up Ubuntu. I couldn't comment and ask for help at the answer because I didn't have enough rep. While I understand that getting rid of the neccesity for rep to comment could lead to spam and other problems, I believe that people below 50 rep should be allowed to comment but it must be approved first, or you could lower the barrier to like 30-50. Alternatively you could just permit people to comment on links that are on answers to qiestions they have asked.
//I understand that this may have been placed in the wrong spot. I would be appreciative if someone moved this to correct location.