I carry a small gas siphon in my BOB on the off chance I bug out with my vehicle and have to scavenge for fuel if gas stations are no longer functional. I am now rethinking this choice. I was talking with a fellow local prepper about BOB items. When I told him I had a small gas siphon in my pack, he said I was just wasting space in my pack for it. He explained to me that most vehicles on the road have anti siphons screens and unless I knowledge and am carrying the tools to get past it, the pump is useless. Is this true? I don't know anything about cars except how to turn them on. Can anybody shed some light on this?