You're blaming the wrong entity. If you're concerned with this, you should be complaining to your ISP _whom_you_pay_ that they use Spamhaus. You have control of your service, go buy it from someone who doesn't use Spamhaus. Spamhaus isn't screwing with your Inbox, your ISP _whom_you_pay_ is screwing with your Inbox by their choice to use Spamhaus.
Don't get me wrong, I think Spamhaus is one of the best things since sliced bread. Why does your ISP _choose_ to use Spamhaus? Because the extra cost and resources involved with NOT using Spamhaus would impact their bottom line and they would have to charge you more.
Before all the botnet takedowns, RBL's used to account for blocking about 80-85% of inbound connections. Now it's down to less than 50%.
Webmail System Statistics for 2011-10-12