Modify "New Post" Form

Site: http://dubiousdata.net/forums/forum/news
WP Version: 3.8
bbPress Version: 2.5.2

I would like to modify the new post form that displays below the current topics in a forum. I was trying to do it with only CSS, but I have run into a problem.

I want to remove the “Topic Tags” field below the body area. I initially tried with the following CSS:

label[for=bbp_topic_tags],
input[id=bbp_topic_tags] {
display: none;
}

This removed the form and label themselves, but there is a <p> </p> tag around these with no Class or other identifier, leaving a noticeable space.

What is the best way to accomplish this or modify the form?