Q:

After 60 days with no activity, a question should automatically become protected

I've been seeing a lot of really old questions being bumped to the front page because a person who most likely found the question on google answers "Yeah me too". 
These are two examples:

How print the design view?
Only solid color possible as background in Windows 7

I'm sure there are more. In these questions, the answers have been deleted by an admin/votes, but they were there at one point.
That's why I say that all questions that have gone 60 days straight with no activity should become protected.

A:

If a question has three deleted answers from < 10 rep users, Community ♦ will step in and automatically protect it. Thus, all you need to do when you spot non answers is to use your flags (or delete votes, if you have sufficient rep). 
I think that's a good enough system, there's little reason to close the doors to every new user just because a question is old. If there are clear signs of trouble (deleted answers), sure, but if there are not, what's the point?

