I agree, but limiting rights is not a good way to approach the issue. Raising taxation on 2+ properties is much better. And perhaps there are even better approaches, but an not an economist.
What about multiple of anything? How about 2 cars? After all, each car takes limited parking space and adds to traffic problems. How about eating more calories than one needs to live? Should we review all existing items that one can buy?
One problem at time. Using the overwhelming tactic is just that, a tactic. Just because there are other issues we face, doesn't mean we shouldn't fight this battle. But at the end of the day the answer is yes- we should review all existing items that one can buy. Have you seen the state of the environment lately?