Prove it!Possibly, but given that dice are random and millions of people play games that involve rolling dice, it's not that unusual that some people are going to have strings of bad luck. It would be weirder if that never happened.
Fairly often on BGG you'll read laments that dice hate someone. "No, really, I never rolled higher than a 3 all night" or, "They kept rolling 6s." Which always sound like selective memory to me.