It does have an option to allow UK format in phone validation.
Replacing the values in the validation wouldn't help your problem... if the replacement took place you would still get the spam submission just with a replaced value.
I'd use CAPTCHA in your form to prevent robot spam. Either the simple question or image form would solve this problem entirely. That is the reason it was created.
If you want to block specific values, then the validation should work even without replacements to block the submission. I don't feel like the replacement is necessary or even wanted when it comes to simply blocking specific values from being accepted.
I think you could add: \r and \n to the alphanumeric validation "allow other" to allow line breaks.