you literally can lie about many ECs , how can they check if someone worked 50 hrs or 150 hrs lmao. or were member of a club lmao? you can fake it so easily.
Sometimes they do check. The UCs, for example, are known to randomly call up on schools/organizations and check the validity of an applicant’s ECs. If they find out you lied, you will 100% be rejected and possibly be blackballed from other schools as well.