Basically, I have a form on my site which gets stored in a database. If someone types css in that form and I reurn it to a seperate page that css will effect the page. How do I stop css from returning in the results?
I think what captcha was saying is that CSS is the least of your worries. If your saving unclean data into a database I could type quarry's into your form and delete tables or all sorts of stuff. Or I could type JavaScript into your form a hijack your site / page... bad stuff can happen, much worse that changing the font size / color.