From what I can tell, after a poll has ran its course, there is no way to close the poll to prevent future voting. The only way that I can tell to cease voting is by deleting the poll entirely or having it set to where only I can view it.

This prevents us from having historical data to show community votes, can we get a feature added to the Poll application to allow for owners of a Poll to manually close it out to prevent future votes when their deadline hits for the poll?