It seems there are mathematical ways for the tricksters to cause the number of votes to be tied. For instance, if the final total is D=271, R=267, then all they need is to negate 4 D electors to make a tie. If Hawaii (with 4 electors) went D but did not certify their votes, then it seems like that would mean the net result is D=267 (271-4). Now the electors are tied and it would go to the House to decide.