"I could have gotten it past you if I just had been dishonest and not disclosed it" is exactly the reason this person is unsafe and should not be allowed near any free software projects.
@dalias nailed it. Consent requires being able to make an uncoerced decision that is informed by the relevant facts. Using pressure or deception is not "getting around" consent, it's flat out violating consent. People willing to treat others' consent as violable in one context are untrustworthy in any context. Same for anyone who treats refusal of consent as "punishment"; if you're not willing to accept no consent or withdrawal of consent, then a yes is meaningless since it there wasn't an uncoerced choice available for them to make.