Ha. lol. So funny... The people at my local station keep asking why I'm buying tickets if I can just jump the barriers. I think if I actually did it they wouldn't care if I had a ticket or not, they just saw some-one jump over the barriers!! I also once got told off off having lots of used tickets in the back of my railcard holder, apparently it means I'm using them more than once if I have lots (that doesn't seem logical to me, surely lots means you're buying lots?). Then the dude looking at them said 'wow, you've been all over the place (looking at my tickets from durham, essex, manchester, derby).
But yes, if you go through the swinging door barrier, and just wave or hold anything ticket-looking as you go through with lots of luggage and/or PJs, they just let you through... But don't look like you're in a hurry, they like to stop you then cos they think you're trying to cheat them. lol.