What are some potential pitfalls of using a simple Up-Down-Vote system for ranking names in PHP?

One potential pitfall of using a simple Up-Down-Vote system for ranking names in PHP is the possibility of manipulation or bias in the voting process. Users may create multiple accounts to artificially inflate the votes for a particular name, leading to inaccurate rankings. To address this issue, you can implement measures such as requiring users to be authenticated before voting, limiting the number of votes a single user can cast, and implementing captcha or other verification methods to prevent automated voting. 

// Example code snippet implementing measures to prevent manipulation in a voting system

// Check if user is authenticated before allowing them to vote
if(!is_authenticated()){
    echo "Please log in to vote.";
    exit;
}

// Limit the number of votes a single user can cast
$max_votes_per_user = 3;
$user_id = get_user_id();
$votes_cast = get_user_votes_count($user_id);

if($votes_cast >= $max_votes_per_user){
    echo "You have reached the maximum number of votes allowed.";
    exit;
}

// Implement captcha or other verification methods to prevent automated voting
if(is_automated_voting()){
    echo "Automated voting detected. Please try again.";
    exit;
}

// Process the user's vote
process_vote($name_id, $vote_type);

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