@Haz - Probably the case - but maybe he's on about people passing though the T1 tire barrier. There apparently a that allows drivers to simply go through 'em.
There is some red and white barriers too at bl1's famous chicane
Oh, and, you can pass them without crack mod hack and others bad things, you just need to rush to it with a lot of speed (without tweak...... of course !) :P
But, at least, you may finish on the roof