.fa.fa-lock {
    font-size: 0 !important;
    display: inline-block !important;
    width: 30px !important;
    height: 25px !important;
    background: url(/static/xzibit.png) no-repeat center center;
    background-size: contain;         /* or 'cover' */
    vertical-align: middle;
}

.fa.fa-anchor {
    font-size: 0 !important;
    display: inline-block !important;
    width: 30px !important;
    height: 25px !important;
    background: url(/static/fart2.gif) no-repeat center center;
    background-size: cover;         /* or 'cover' */
    vertical-align: middle;
}

.fa.fa-thumb-tack {
    font-size: 0 !important;
    display: inline-block !important;
    width: 30px !important;
    height: 25px !important;
    background: url(/static/poopdance.gif) no-repeat center center;
    background-size: contain;         /* or 'cover' */
    vertical-align: middle;
}