Kathlyn Ehl’s brief stint as a policy assistant to the gubernatorial campaign of Rob McKenna, R-Wash., serves as a warning that Twitter has a long memory and that nasty tweets can come back to haunt you.

Late last year and early this year, before she worked for McKenna, Ehl penned two Twitter gems that mocked Asians and the elderly. She joined the campaign in April, and two months later a Seattle blogger dug through her Twitter archives and found her own words to use against her.

The McKenna campaign called the tweets “offensive and inappropriate.” Ehl apologized and eventually resigned from the campaign. “It is a lesson to others that social media comments made in frustration not only can hurt others, but they exist long after the moment has passed,” she said.