The CreateWorkerBlock operation allows you to prevent a Worker from working on your HITs
Source:R/mturk_operations.R
mturk_create_worker_block.RdThe create_worker_block operation allows you to prevent a Worker from working on your HITs. For example, you can block a Worker who is producing poor quality work. You can block up to 100,000 Workers.
See https://www.paws-r-sdk.com/docs/mturk_create_worker_block/ for full documentation.