I will repeat what I've said in previous years: This is supposed to be a fun little* event. If someone tries to ruin the fun they will likely be disqualified anyway. And if this stops being fun for people it will stop being organized.
Let's call this a social experiment with prizes. From the start, I didn't want to create rules for every conceivable case, caveat and exemption. There is no such thing as a perfect system anyway.
So far nobody ruined our fun and am hoping this will continue this year!
* This is not such a little event anymore. Las year we had a record 50 entries, now over double that... 113 pizzas! Thank you @John Abraham for you help in posting the (many) entries that were missing.
As every year, I truly am hoping our fun won't be spoiled this year either because some of us have some big ideas for next year's event!
If I can suggest a valid alternative for next year, I suggest you keep the contest within the forum and use the merit system for voting with the max limit. of only 1 merit as a vote. This does not allow external votes and keeps the vote closely linked to the pizza and its success.
I totally agree with you, everybody can vote on Discord, I don't understand why the voting isn't kept within the forum so it's possible to see who voted for who and whether the account is legit or not based on the registration date.