1) When someone mentions someone else in chat, it pings them as expected. If you edit a message, it pings them again. Edited messages should not ping. Only the initial post of a message should ping. This allows you to have a mention that doesn't ping someone. 2) When you click on a mention of someone, it should show their profile box like clicking on the their portrait does. This way when someone mentions someone, you can actually see details about them.