Well, what is it that's being offered or foisted upon you? If it's a faulty product or an STD, you'd be quite right to kick up a fuss. If it's a patch for a game that didn't work on day one then you can criticize the company for its practices but you'd better do so constructively if you want them to avoid repeating them. If they're giving you a gift for no reason other than they felt like doing something nice, you should be grateful.