Douglas Bergeron, prosecutors say, just couldn't leave well enough alone.

When the Medford man got on a Route 117 bus with a companion on Oct. 13, he tried to pay for both both their fares with his CharlieCard, but it turned out his card didn't have enough stored value. Rather than kicking one of them off, the driver just waved them both on and told them to have a seat, according to the Suffolk County District Attorney's office. And then, the DA's office says: