I can only speak for Alton, but at the Town Meetings before SB2 became our way of life

, non-residents were able to speak on an issue or issues that had an effect on them. Occasionly, someone would take advantage of that, but not very often.
Because of other commitments since we have gone to deliberative sessions, I have not been to one, but I would believe that you can also speak there as well.
If memory serves me correctly, you simply needed to register at the door and state which article(s) you wished to address.
Can you vote? No. Can you address your issues? yes. Will it make a difference? Don't know until you make the effort and try.