I  was recently on a flight from DCA to DEN then to SLC. When I got to the gate I was told my bag was too big for a personal Item, yet when I put it in the measuring bin...It fit perfectly fine. This happened to two other individuals and we were charged $100. One of the passengers even had to throw away all of her personal belongings to the trash in order to fly because they closed the gate on us. After paying I finally got on, but little did I know the nightmare I would live in Denver. I was filming my bag to prove my bag fit in the bin, and I was denied the access to fly to Salt Lake City because of the video . I was told I could not film because it was private property and I did not have consent to film my bag. All I wanted was to film to prove my bag was the exact size, in fact frontier airlines claims the bags have to be 18x14 and mine was 18x12.99. I got this bag on amazon and it was considered the perfect size for a personal item. I had to sleep at the airport and buy another ticket the same night with another airline in order to get home. Since then I have seen many comments of this happening to others. They are taking advantage of their customers! We need a change.