is quite ironic that click dicks don't realise they are boosting your CTR if adwords doesn't discount it so if it's running at a cheap cpc I personally would just think an nice thanks to them for boosting my CTR skywards
Can't say as I have much faith in the adwords quality control team, we had an issue with their ads on dealtime,
we had dire ROI on an keyword that just exploded, they told us that 60,000 impressions resulting in 17,000 clicks costing $11,000 dollars was all legit, despite the fact that google as a whole delivered less than 500 clicks over 6 months previously.
They expected us to believe that dealtime had suddenly found 60,000 genuine users in 5 days on a very specific term.
Needless to say after strapping on the size 12's to get them to take another look, which took 4 months to undertake, they agreed it was click fraud and refunded in full.
So I'd say report EVERY instance of what you suspect is click pimpery to them, don't just assume they have removed dodgy clicks, check you own site stats against your click count in google and if in doubt complain with plenty of details.