I resent the use of the term "jack off" for the very nice FFF that saved a total of 4 seats, including 2 for me and my hobbling husband, just long enough for us to get into the venue. Just saying don't generalize all of them, please.
I agree with Sue. It's courteous and considerate to save space so friends can enjoy the show together when all can not arrive at once. Blankets help establish boundaries that are generally respected by civilized, conscientious people. I respect your opinion,but I don't have to agree.