What's A Good Contact Form For Multisite

Ok, so I use contact form 7 at the moment for my my multisite. The people on my site have to enter their email manually but some of them try to edit the contact form itself and mess up everything. I tried to use CSS to hide the form options but that didn't work. Is there a contact for specifically for multisites where my bloggers can ONLY put their email & not touch anything else?