They may get frozen accounts, but the ad publishers don't froze them just like that (everyone could paralyze ad publishing on sites they don't like) so if they

They may get frozen accounts, but the ad publishers don't froze them just like that (everyone could paralyze ad publishing on sites they don't like) so if they see that "click" was made with "I'm a bot that click things" user agent they will detect "invalid" click, not sneaky fraud attempts :) (although someone may also use PyQt4 webkit apps as a fraud apps, but it's not the point of this code tutorials). It may be used in "bad" or "good" ways.