Well I've been searching for OC gun grab news stories and have never found one. As for being involved in a situation, that is another one that strikes me more as urban legend than anything else. I'm sure there may have been instances but I can't really find any instance where a guy doing open carry was singled out and shot by bad guys, while I did find stories about guys doing OC who were present and bad things did not happen the way bad guys had hoped.All that and for what? An increased chance of a gun snatch? A guarantee to be involved in a situation you may not want to be?
To your point about the anti-gun crowd and their feelings. That is a valid issue. However I don't think it should stop people from practicing OC. I just think it makes it important for those who choose to OC to do so in a very responsible and respectable manner. Who are you likely to be more afraid of, a neatly dressed/professional looking man doing an open carry or a gang-banging wannabe? Situations also affect things, if you are doing OC and you are walking with your wife and children you probably don't appear to be a threat, but a group of natty dressed young men doing OC may give off a different appearance to onlookers. JMO