IP Address
If the AdSense click is originated from the same IP Address as the one used for accessing your AdSense account, your account is flagged.

Cookies
Most home users do not use static IP Address for Internet connection. In most cases just disconnect and reconnect will give you a new IP Address. But don’t forget, Google has set cookies on your computer.

Click-Through-Rate (CTR)
Your CTR may range from 0.5% to 10%, but if it exceeds a certain point (probably around 10%), you are flagged.

HariesDesign.com - Many people believe that when the lights go low the best way to capture a shot is by utilizing the camera's flash. While I'm a frequent user of strobes in my photography (mainly in studio environments), my first instinct in a low-light scene is to go flashless. I find that by using available light the scene can be captured in a more dramatic fashion. Here are some tips I use in photographing in low light:

Calculating the Exposure Figuring out what exact shutter speed and aperture you should use can be very challenging in Manual Mode. I would recommend that you just try many different combinations for each scene and eventually you will refine the settings that you prefer. Another tchnique I use is Bracketing, if you bracket all your photos so the camera takes multiple exposures at different settings, you are more likely to end up with a photo that has a satisfactory brightness.

HariesDesign.com - Joomla's admin username can be easily changed with a simple MySQL query. The most convenient way to manage the database is through the phpMyAdmin tool. Go to your cPanel and click on phpMyAdmin in the Databases box. (If you are not using cPanel or do not have phpMyAdmin, you can run the query directly for Joomla's database.)