to hinder; to obstruct

to jeopardize; to be harmful to; to undermine

(golf) stymie

to constrain and limit successful, capable people

(law) obstructing government administration

there is no harm in; might as well

no harm (in doing it); One might as well.; It won't hurt.; no matter; it's no bother

what harm is there in (doing sth)

there is no harm in saying what one thinks (idiom)