How to Disable Toolbar in Altervista Blog:

#av_toolbar_regdiv, #av_toolbar_iframe, .av_site, .av-antipixel {
 display: none !important;
}
body {top: -32px !important;}

#av_toolbar_regdiv, #av_toolbar_iframe, .av_site, .av-antipixel {
 display: none !important;
}
body {top: -40px !important;}