How would these town guardsmen react?

[NewJeffCT]

Since I'm running a sandbox, I'd probably roll on my Reaction Table to determine how they feel - if I didn't already know. It sounds like you don't.

One of the features of rolling on random tables is that you can run the game impartially.

I might do that if it was a situation that called for it - and I have done that in the past - however, the guard has a very specific job and I would think his range of actions would be limited.