Use report option on his posts. BTW what is a copypast ? Shouldn't it be copycat ?
A copy paster is a guy that uses Ctrl+C and Ctrl+V (copy/paste) to create his post with the same words identical content.
A copycat is this guy, who has tried to imitate your post but changed the nostrils :
One good plan is to close the left nostril by pressing on it with the finger, then take four deep breaths through the right nostril.
Close the right nostril and take four deep breaths through the left one. Repeat this about four times and you will feel relaxed.
Now seriously OP, lock the topic.