Unprepared Speakers Speaking in Public

Whats with the current trend of speakers going on stage and start with "i'm sorry with the quality of my slides, I didn't have time to prepare them" or "I didn't prepare for this so I will just wing it".

God dang it! I spent MY valuable time to go there and listen to you speak, the least you can do to respect me as your audience is prepare something in advance! That revelation you just made may be an inside joke for you or a way for you to release some stress or tension, but to me that is the ultimate sign of disrespect you can ever show to an audience!

So what now? Now, whenever someone starts off by saying that, I WILL heckle them by saying "You suck!"

See how they feel hah hah hah