I got my last employer to agree to change the IP terms. It was a typo in their document nobody caught, that asserted ownership on everything. They were only too happy to fix it so it only applied to work done for them. I did have an industry specific non-compete as well, but it's a fairly narrow segment, so I had no problem signing.

My current employment agreement specifically states I can run whatever enterprise I want outside of work so long as it doesn't interfere with my duties (and presumably their business).