Many onClick handlers that all append different text to one textarea
We can reduce duplication by using an object as a dictionary, and look up an output value based on an element's ID.

var messageMap = {
    "add_user": "Lorem",
    "add_disallow": "Ipsum",
    "add_wild": "Dolor",
    "add_comment": "Hey",
    "add_bb": "World",
    "add_gdrive": "Its Time",
    "add_gimage": "To Move",
    "add_gnews": "Again",
    "add_bash": "Thats it"
};

$(document).ready(function() {
    $.each(messageMap, function(key, value){
        $("#" + key).on("click",function() {
            $("#textareaFixed").append(messageMap[$(this).attr("id")]);
        });
    });
});