Tell me if you have also vacuum cleaner abuse vids. Yeah no need to change the bag because if you only suck on pillows and hands and clothes, it will never fill up. Good to have the bag almost full, then start the fun ;)
I think it's a good idea to torture the vacuum cleaner until it's Game Over. Then you can buy a new one second-hand as used, they are cheap and already gone through a lot of abuse ; )