Jon Daniel was watching cartoons with one of his sons when he created a spoof Twitter account in the name of the Peoria mayor. Out of boredom, he said, he soon began sending profane messages about sex, drugs and alcohol. Daniel never intended for the fake account to be seen by anyone other than his friends, and it never attracted more than a few dozen followers. But within weeks, the raunchy parody led to a police raid of his home and ignited a debate about online satire, free speech and the limits of a mayor’s …