The mechanical bugs that have been seen around town are from my world. Yes, they are dangerous and yes, they will consume any tech they can get their hands on, the more advanced the better.
At home, we were able to build a weapon to defeat them. Unfortunately, the person who was primarily involved in that is currently missing. If any science and tech folks are available, Jack O'Neill and I will do our best to guide you in recreating it.
For everyone else, if you ignore them, they shouldn't get too hostile. Firearms will destroy them, at least temporarily.
I'm sorry I don't have better information. I assure you, we're working on resolving this issue as soon as possible.