I failed an attention check, got a rejection...it sucks. I rarely miss them. Emailed the requester, he was super nice about even providing a screen shot and going overboard to show me how I screwed up. I asked to have my results removed, since I wasn't getting paid. He responded with:
Not a problem. You have the right to withdraw your consent at any time. Your deidentified data will be removed from the dataset, alongside data from any other participants who failed attention checks.
All the best,
Nick
Just had to add that last part in there didn't you.