No selling or advertising under this category. Any posts regarding selling or advertising an item in this category will most likely be removed or deleted.
People are allowed to post questions and comments for advice, help, opinions or critique. On the other hand, people are allowed to freely give advice, give their opinion or critique on a post or topic.
Criticizing. If you are asking for critique, don't be offended if you receive it. Criticizing is fine, but be remember to criticize the idea or whatever is being posted, and not the user.