Sometimes, I make the fun of taking them, changing them a bit to suit my needs, then printing them along with a summary of the changes and sending them
back to the respective companies, with a comment that unless I hear from them back in a reasonable amount of time (usually 2 weeks after the arrival of the letter), I consider the changed version as accepted and binding.
You wouldn't believe what strange stuff those guys accept.

In general, I just let my lawyer deal with it though.