Several times but it doesn't bother me none these days. Been in the game too long to get worked up over words being copied and pasted. 😛
We always encourage people to put a source link back to the original content for things like news articles and blog posts they want to share on the forum.
We've had some articles/guides stolen from other sites before (usually copy-pasted content), but we usually just take action against the stealer. Just a cheap way to claim info that's not theirs. It's pretty easy to tell when something is copied from elsewhere. 😛
There was a forum or two where it was clear they were copying our forum layout, new events that were customized for our forum. At first it became a big deal to me, but now a days it doesn't bother me too much. If people really must steal in order to better their community - good for them I suppose. At least I know it was original for us.
It's almost a good feeling that you must be doing something right. 😛