I admire resume liars. The job market isn't fair and you should do anything you can to get ahead. (Employers are going to pull tricks like this, so why not? Just be smart about it)
For instance, if you start going to the gym, at first, your exercise execution is perfect but after some weeks you get sloppier and sloppier.
Same here, firms that are hiring constantly tend to get fatigued. Jobseekers, however, are "active" for some weeks until they switch jobs; this is why you, as a jobseeker, need extra training during your jobhunt, to be on-par with them.
I don't recommend lying but I do recommend tailoring your resume such that it reflects actually what you did in an adequate level of detail. Most job seekers are too honest on the CV and during interviews.