a) 3 clicks is highly unlikely to matter.. b) you can always block* Swaziland ( or anywhere else from seeing your site and or your adsense ) see old threads here in "spiders" and also in "htaccess" for some methods..
Lots of people block countries that are "click happy"..plus Google know the "click happy" countries and they deal with it all behind the scenes before payout..you are just unlikely to actually get paid for some or all of those 3 clicks..Imagine your site gets thousands of clicks or tens of thousand or even hundreds of thousand daily ..from all over the world ..G know you can't "police "that ..so they discount and balance it all themselves..
IME ( in my experience ) you'd only need to tell them if you began getting over 10% of clicks that you didn't think were OK..
* meaning send them a 403..or send them to a page that has not adsense ads on it, but maybe other ads..
[edited by: Leosghost at 10:27 am (utc) on Jun 30, 2012]