They should blame me for it. They should blame me for carrying the knife about with me in the first place. I'm not saying that you're a horrible cunt, I'm just saying that basically "I deliberately carry a weapon about with me for 'self-defence'" is a shit shout & is the defence used by plenty arseholes round here who stab somebody up. "I was only carrying the knife for self-defence". Sorry man, I just don't think that's OK. I know people who've had their face ripped open by someone who was carrying a blade apparently just in case someone tried to fight them & they couldn't fight back. I don't think you're a total cunt or anything but I do think that's a cunts-trick.
Basically, I don't see the difference between your dodgy syringe & a knife. I don't think it's OK to carry a knife about with you, for whatever reason. I know too many people who've been stabbed or slashed.