[Plugin: Enmask Captcha] Halloween theme Captcha

What do you think to have Captcha with Halloween theme? enmask.com can provide Halloween fonts as Captcha challenge text and answer, I think it will make your reader more interested in signup or post, is it a good idea? suggestions?

Thanks,
Steve

http://ww.wp.xz.cn/extend/plugins/enmask-captcha-text-based-hosted-captcha-solution/