The best way to validate an email address is to sent it an email validation link.
Anything outside of that is a waste of effort.
Ha, great tip. I’ll keep an eye on it
Looks cool! Can I suggest putting a snake head on it? The sharp point is a little unsettling
People have already covered the great ones so I will mention one of the more obscure.
https://addons.mozilla.org/en-US/firefox/addon/don-t-fuck-with-paste/
Yeah, that particular turn of phrase annoyed me a little