If a company that sold static analysis products did this as part of a marketing campaign, would you likewise have so many reservations about blacklisting contributions from that company, or would you still be insisting on picking out individual employees?

It's pretty obvious what would happen if a firm tried this: they'd be taken to court and probably imprisoned, as this is a clear violation of the law (which is pretty broadly to capture any attempted interference with the correct operation of a computer program).