It is not easy to vote fraudulently in person. First, you have to be in the right polling station, you need a valid ID, an ID with valid dates,  second, your name needs to be current in the register, third, nobody has signed by your name.

People have been turned away for lack of ID, for not currently registered, for promoting specific candidates.  Each station is manned or womaned by at least 5 to 7 people.

So, do not waste your time to try or ask your friends and neighbors to try.