have a ripple effect(the repercussions of an event or situation experienced far beyond its immediate location // a spreading effect or series of consequences caused by a single action or event: An increase in the price of oil will have a ripple effect on the economy as a whole. Увеличение цен на нефть окажет влияние на экономику в целом. • His resignation will have a ripple effect on the whole department.Interex)
shoot oneself in the foot(We'll be shooting ourselves in the foot by putting a cap on immigration, which helps close the skills gap in Britain.Moscowtran)