Another poster mentioned H1B visa holders, and I'm sure that is a valid concern there, given how poorly H1B holders are treated. But as a citizen, I've heard th

Another poster mentioned H1B visa holders, and I'm sure that is a valid concern there, given how poorly H1B holders are treated. But as a citizen, I've heard this many times, been told it to my face during sit downs with my boss while refusing to do something shady, and it has never happened. On two occasions, the threat was idle. On two more, I quit and they never did find anyone to replace me. But regardless, even if it were true, you still need to protect your own soul. Better to let someone else corrupt themselves.