Just use "report to moderator" button that's under the post, mods will find it much quicker than when you post it in a thread.
Yeah, I already do that. I've found the most reliable method (most likely to result in a ban) to be a double-barreled approach! 
I first document the plagiarism in LoyceV's topic and then I use "Report to moderator" on the offending post and include a link back to my "report" post.