I won't tell you how to do it, as I don't know how to do it and never want to know how to do it, but there's a glitch that will allow props to glitch through roofs and get inside/on top of buildings you're not supposed to be inside/on top of. There's a new glitch that's arisen, and it isn't good.
Picture taken from YouTube channel called TheOrangeBox
Raven Software has noticed this and Amos Hodge, the lead designer at Raven Software, has released this statement earlier today on Twitter: It also occurs if you're falling, and then stand on something for 10s, and maps like Backlot is one to really give the players the boot. If you move without looking around for too long, you will be kicked. If You stay in the same area for tool long, you will be kicked. If you stand still, despite looking around, shooting, etc., you will be kicked. Previously a player could not be kicked from Prop Hunt, and you still can't if you're a prop, but the hunters have it bad.
With Prop Hint returning there was a "fix" the developers put out to stop people from farming Depot Credits, because Prop Hunt gives out a dense amount of them per game, especially with 2x Depot Credit events that usually come with the game mode. When playing Prop Hunt as a hunter, you may notice you've been kicked for inactivity, and you think to yourself, "Well what the hell I was active", well you're not alone. This one is a big issue that needs fixing immediately.