Responding to concerns about click fraud in the online-ad industry, Google will be revealing to advertisers the number of invalid clicks on their ads with changes it's set to make to its AdWords system late Tuesday.

Now advertisers will be able to see the number of invalid clicks Google found, as well as what percentage that represents of total clicks registered, said Shuman Ghosemajumder, business product manager for trust and safety at Google.

Source: http://news.com.com/Google+to+offer+advertisers+click+fraud+stats/2100-1024_3-6098469.html

is there any way to prevent invalid clicks from other users who intentionally click ads to make is disable and lose our account

You could create an IP switch, if the user has your ip or another one from a list, you add
google_adtest = "on";
to the adsense javascript and the adsense is in a sandbox

PS: google_adtest is undocumented and might be removed at any time, use at your own risk ... <rest of disclaimer> :-)

Why do you think "google_adtest" is unsupported?

The advertiser gains (they don't have to pay for any clicks they get that way), the content provider gains (no fear of being kicked out of the program), and Google gains (reduced click fraud).

So why won't Google let content providers help combat click fraud themselves?