This happened in Roanoke, which is left leaning. Republicans are going all out to cheat in this election.
Edit: Here is the law on tampering with ballots in Virginia. Class 5 felony
https://law.lis.virginia.gov/vacode/title24.2/chapter10/section24.2-1009/
The question of course being: what will you do or can you do if it’s not accepted? How far will someone go to make their vote count? Many people would likely not bother with it, which could make this a quite succesful way of sabotaging.
You usually have to go to a county office in PA. They may try to contact you if it’s early enough