>Some recruiters tend to be a lot more pushy about it,

The simplest solution for recruiters is to lie. Best case scenario you get a much higher offer. Worse case scenario you have to explain to someone at the job that there must have been a misunderstanding between you and the recruiter (which isn't a lie, as their was a misunderstanding since the recruiter thought you were telling the truth). You never have to lie to the employer.