Whats up with Capta

Okay, we have all done it, signed up for something and have had to type in the words or letter number combo's, that verify if we are Human or not. But recently, they have been choosing words that seem words together, like "Kill People"...when i saw that i immediately chose not to set up an account with whatever it was i was doing at the time. Kill People, how do they generate these words, and for what purpose? Is there a rising secret Internet cult, trying to invade the minds of people everywhere, with these phrases, more on this investigation to come.