Earlier quoted context omitted.
Run away. No client/employer is worth that kind of baggage. It's even worse than a non-compete: instead of you simply being prohibited from competing with them, they automatically own your creations.
Although I agree with you - no client/employer is worth that kind of baggage - I was sort of surprised, after four months of unemployment when my last company shut down abruptly (no warning, no severance), just how many things seem negotiable when you're starting to worry about unemployment running out.
Courts tend look unfavorably on any agreement that doens't allow you to earn a living doing what you know how to do. As such non-competes as bad as they are are very hard to actually enforce in court. The threat of going to court though can be scary.
Remember if you need legal advice ask a lawyer not some random idiot on a forum.