SSLのエラーを無視しちゃう（だがしかし、こりゃ危険か…）

gistfile1.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.X509Certificate;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

public class App {
    static {
        try {
            TrustManager trm = new X509TrustManager() {
                public X509Certificate[] getAcceptedIssuers() { return null; }
                public void checkClientTrusted(X509Certificate[] certs, String authType) {}
                public void checkServerTrusted(X509Certificate[] certs, String authType) {}
            };
            SSLContext sc = SSLContext.getInstance("SSL");
            sc.init(null, new TrustManager[] { trm }, null);
            HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (KeyManagementException e) {
            e.printStackTrace();
        }
    }
    
    public static void main(String[] args) {
        try {
            URL url = new URL("https://twitter.com/statuses/user_timeline/5631932.rss");
            URLConnection conn = url.openConnection();
            
            conn.connect();
            
            InputStream is = conn.getInputStream();
            
            InputStreamReader isr = new InputStreamReader(is);
            BufferedReader reader = new BufferedReader(isr);
            String line = null;
            while (null != (line = reader.readLine())) {
                System.out.println(line);
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}