Why do they do it?

I will never understand why students plagiarize. If you have more than three weeks to write a lousy 3.5-page essay, why do you have to pull something off the web? Hello? Besides, what makes them think, that we do not find out? And as if that is not enough, why on earth increase the font size, make everything bold AND italics, so it really stands out like a sore thumb in your stack of papers, right?

Somebody put me out of my misery and stab me with a knitting needle or sumping, pleassse...