Form says I can't use that kind of language

[funktifyknow]

I have a form that send comments back to me. I have it so that it filters certain words. Recently I had a friend try to send me a comment but was told that they couldn't use that kind of language. I also tried writing a test message using completely safe words. The message was:
Name: Jim
Email: jim@aol.com
Subject: Test Comment
Feedback: This is a test.

I am completely stumped with this and any help would be appreciated.

<?php
if (!isset($_POST['submit']) || $_SERVER['REQUEST_METHOD'] != "POST") {
    exit("<p>You did not press the submit button; this page should not be accessed directly.</p>");
} else {
    $exploits = "/(content-type|bcc:|cc:|document.cookie|onclick|onload|javascript|alert)/i";
    $profanity = "/(xxx)/i";
    $spamwords = "/(viagra|phentermine|tramadol|adipex|advai|alprazolam|ambien|ambian|amoxicillin|antivert|blackjack|backgammon|texas|holdem|poker|carisoprodol|ciara|ciprofloxacin|debt|dating|porn|pills|)/i";
    $bots = "/(Indy|Blaiz|Java|libwww-perl|Python|OutfoxBot|User-Agent|PycURL|AlphaServer)/i";

    if (preg_match($bots, $_SERVER['HTTP_USER_AGENT'])) {
        exit("<p>Known spam bots are not allowed.</p>");
    }
    foreach ($_POST as $key => $value) {
        $value = trim($value);

        if (empty($value)) {
            exit("<p>Empty fields are not allowed. Please go back and fill in the form properly.</p>");
        } elseif (preg_match($exploits, $value)) {
            exit("<p>Exploits/malicious scripting attributes aren't allowed.</p>");
        } elseif (preg_match($profanity, $value) || preg_match($spamwords, $value)) {
            exit("<p>That kind of language is not allowed through our form.</p>");
        }

        $_POST[$key] = stripslashes(strip_tags($value));
    }

    if (!ereg("^[_a-z0-9-]+(.[_a-z0-9-]+)*@[a-z0-9-]+(.[a-z0-9-]+)*(.[a-z]{2,6})$",strtolower($_POST['email']))) {
        exit("<p>That e-mail address is not valid, please use another.</p>");
    }

    $recipient = "my@email.address";
    $subject = "Contact Form Mail";

    $message = "You've received an e-mail through your website mail form: \n";
    $message .= "Name: {$_POST['name']} \n";
    $message .= "E-mail: {$_POST['email']} \n";
    $message .= "Subject: {$_POST['subject']} \n";
    $message .= "Feedback: {$_POST['comments']} \n";

    $headers = "From: terrellharris.net <$recipient> \n";
    $headers .= "Reply-To: <{$_POST['email']}>";

    if (mail($recipient,$subject,$message,$headers)) {
        echo "<p>Thank you! Your mail was successfully sent to the webmaster. Thank you for your time.</p>";
    } else {
        echo "<p>Sorry, there was an error and your mail was not sent. Please find an alternative method of contacting the webmaster.</p>";
    }
}
?>

[JimmyP]

Im sure somebody will be able to help u....

Maybe u could remove those profanity values? (in the code)

[funktifyknow]

OOPS! Sorry forgot they were there. Just really frustrated with the code and didn't even think about it. Thanks for the heads up though.

[technetic]

Hmm I can't seem to find anything critical.
Would it hurt that you have a trailing "|" after the last word (pills) in $spamwords?

[agentforte]

I would suggest a captcha to prevent spam

If you are afraid to program it yourself, recaptcha.org can help you out. The bonus is that it is free (unless you have tons of traffic using the form) and that it does not use up your server resources to produce the image (it retrieves the image from tha recaptcha website)

I am still debating which to use, but I think I will have both working just in case I need to switch between them for some reason.

[funktifyknow]

Thanks technetic. That was the ticket. I'll lok at the captcha things as well agentforte. Thanks again guys.