Re: Employment
Yes I have done this.
I have taken the PDF of the contract terms and conditions, edited it to strike out all of the unreasonable clauses, added my signature it and emailed it back.
Nobody from HR departments ever thinks that anybody would change anything, nor do they take the time to send back the copy signed by them - which they are supposed to do in order for it to be an agreed contract - so it then becomes something they implicitly agreed to and their problem not mine.
Obviously doing things blatantly on 'company time' and 'company equipment' ranges from questionable to stupid, but claims to ownership of "anything you might develop at any time" (which I have seen) are just abusive