Unfortunately the right click and blist option are only a band-aid to the problem. SE would benefit from taking a page from Blizzard's book and adding a "block" and a "report" option to the context menu you get from clicking a name. The report feature as it exists is unnecessarily long and asks for information that by all rights should auto-populate in the report. Add a drop down menu with reasons like "Spam" "Real money trade advertising" etc. SE doesn't have to worry about reading each one because the system can sort by complaints and forward them based on relevance to the proper people.