I think that's a great suggestion.  I've been wanting check boxes for all of a user's posts so I could report multiple posts all from one page...but I know that's never going to happen.  And I'm curious as to what kind of response this will get.  "Report User" along with maybe a field for a brief description of why the user is being reported would be quite handy.  There are many, many users here who just write one-line shitposts, and it's obvious they're doing it to either rank up or meet a bounty quota.  Those posts are zero-value, zero-thought, and they come by the dozens.