It's always irritating to realize when someone copies your own thoughts directly without any link to your original posts...
I have also started to report plagiarism after I found out that someone had copied one of my posts...
Since then I'm trying to find copipasters and I also use the above mentioned thread to report them.
Make sure that this is not your last catch, you can help the forum if you report these kind of users when you read thru the topics.
Also don't forget to check the modlog (#1 post in the copypaster thread how to check modlog) if the reported user has been banned and edit your post accordingly.