BuddyPress.org

Managed to finally sort it out by myself using the following custom css

.buddypress #buddypress div.dir-search input[type="submit"], .buddypress #buddypress .message-search input[type="submit"], .buddypress #buddypress .item-list-tabs ul li.selected a, .buddypress #buddypress .generic-button a, .buddypress #buddypress .submit input[type="submit"], .buddypress #buddypress .ac-reply-content input[type="submit"], .buddypress #buddypress .standard-form input[type="submit"], .buddypress #buddypress .standard-form .button-nav .current a, .buddypress #buddypress .standard-form .button, .buddypress #buddypress input[type="submit"], .buddypress #buddypress a.accept, .buddypress #buddypress #activate-page .standard-form input[type="submit"], .buddypress #buddypress .standard-form #group-create-body input[type="button"], .post-password-required input[type="submit"] {
	display: none !important;
}