Governor Paul LePage has vetoed a bill that would have banned smoking at all public university and college campuses in Maine. The Republican governor said in a veto message to the Legislature that ‘‘Maine people can make their own decisions’’ regarding tobacco. He suggested that people opposed to smoking bring forward a bill that bans tobacco altogether, rather than ‘‘a patchwork’’ of laws and regulations that dictates where tobacco can be used. The bill’s sponsor — Representative Benjamin Chipman, independent of Portland — told The Portland Press Herald that he is ‘‘surprised and disappointed’’ with the veto. Many state colleges and universities are already tobacco-free.