Proof :
https://boinc.multi-pool.info/latinsquares/workunit.php?wuid=3996272
https://boinc.multi-pool.info/latinsquares/workunit.php?wuid=3996277
https://boinc.multi-pool.info/latinsquares/workunit.php?wuid=3996278
This is a big deal because it allows a malicious attacker to get credit for fake results, and it can also feed the program bad data, false result happens with every hardware, if you have your cpu or gpu overclocked it can ramp up even further.