Cops could have watched this guy... he strikes me as someone a good cop probably SHOULD watch, and perhaps even strike up a conversation with. But that's not what happened.
If these people are doing nothing wrong, then cops shouldn't be watching them. I don't want cops wasting time watching people OCing by carrying their weapons in their hands. If we are also so worried about violating a person's rights, why should someone doing nothing wrong have to get engaged by the police? No one here upset at the cops should be saying the cops should be watching this guy, or striking up a conversation with him. If he is truly doing nothing wrong, there is no reason for the cops to even be involved. This is how it should be, no police involvement at all. If everyone here wants OCing to include carrying guns in the hands, that is something we will all have to put up with. If there is reason for cop(s) to be taken out of service to watch such a person, and even go as far as someone they should engage in conversation, then it sounds like to me we have a problem. If there is no problem, no need for the cops at all.