vacuuming? vacuuming breadcrumbs thrown by spectators? it felt a little disrespectful. it s really cathartic. give her something to do. reporter: the real ivanka has plenty to do, launching a women s development initiative thursday. this is a look-alike dressed in an outfit to what ivanka wore to the g20 summit in germany. but you would think vacuuming ivanka was real, the way some conservative websites have reacted. violent art exhibit invites people to throw trash. i mean, people are not throwing crumbs at her. no, they throw them on to the carpet. reporter: fistfuls, sometimes two handsful deposited on the pink carpet. artist jennifer ruble s artwork is exhibit at a washington, d.c. gallery. a lot of people throw the crumbs, and then they re really expecting her to hop to it and vacuum them right away, and are a little disappointed by that. reporter: there is nothing worse really than having your