I'm pretty sure this is a dupe of a question from a couple weeks ago but I've been searching for about 15 minutes and I can't find it (somehow forgot to favorite it).
I want to prevent users from inputting their e-mail addresses or URLs into a text field. How can I automatically reject such submissions?
Plain text input filter, there is an option to Convert URLs into links, which also converts e-mail addresses into links. But what I want to do is remove all URLs, including e-mail addresses, that would be converted via this option. Is that possible?