IANAL but I could imagine that this leads to different problems in some jurisdictions.

Depending on how you look at it using another's entity's cryptographic key to sign something that then "pretends" to have been produced by that entity might classify as forgery.

Though this is just my personal thoughts, not sure if that would hold up in practice. Technically you own the hardware, so "forging" the signature yourself for your hardware probably wouldn't be an issue, but distributing it might be.