Thats clever, I would never have thought of using the "ignoreclick" property! Here’s a modification that checks the varname attribute using a regular expression. This means that including another [button] in your patch that is click enabled (with or without a scripting name) will not break the result.

lh

var result;
var pattern = /^b[d+]$/;

function bang() {
    post ("go!n");
}

function whois() {
    result = "no";
    this.patcher.apply (find_bang);
    outlet (0, result);
}

function find_bang(a) {
    if (a.maxclass == "button" && !a.ignoreclick && pattern.test(a.varname)) {
        result = a.varname ;
    }
    return true;
}