Yeah, DRM has a pretty bad reputation..and despite of what they try, I don't think BIOS DRM becomes the tyrant; at some point people get frustrated, and -- bad for the sellers -- if they don't buy it, the manufacturers can't make it.
There's a long list of "copy-protection" methods that have been invented, and this far each and every one of them has proven useless; the only thing they've done is made the life of those harder who actually don't try to break the copy protections. And that has lead to a lot (most?) of them being rejected, because people don't like buying audio discs that don't play on their legal players. I assume the same goes with DRM, but maybe in a longer run because it's hyped and developed so much.
Personally I'd rather buy food than a DRM-forced BIOS with a crappy computer around it.