If a potential employer checks your background and finds you weren't being honest, that's grounds for dismissal, and certainly grounds for not hiring you in the first place. Don't hide the fact that you are unemployed, held low-level positions, or hopped around from job to job. But don't leave such things unexplained either, or people may assume the worst. The best strategy is to use your resume or cover letter to turn potential negatives into positives with short, general, and truthful explanations. Now that I've made my contribution, I want to jump back into the job market.
Many people feel compelled to offer excuses for why they left former jobs.
This is a mistake. The hiring manager who is reading your resume will assume that you have professional references, and that you will hand them over if asked.