Should Websites Delete Comments, Ignore, or Reply?

Should Websites Delete Comments, Ignore, or Reply?

Allow or block comments?

Using your judgment on website comments

In the same scenario, another person might comment “Here’s an 11th way: Pour lemon juice down the drain and wait a few hours. The acid eats through the clog, no effort needed!”. If that’s a legit solution (remember, you’re the expert on plumbing) then you can either leave it as-is or add a comment “that’s a neat idea, I’ll have to try that next time I’m facing a clog” or similar.
My rule is always that the site is my publishing empire, however small, and so I have the right to do whatever I want with comments and user feedback, including changing a phone number to “\[redacted\]” without permission. I’d never change the intention or emotion of a comment, but I’ve been known to secretly fix typos in user comments just because they bug me!
Now, what’s your policy with comments on your site? Do you allow them? What do you delete, allow, and answer? I mean, you are paying attention to your comment stream, right???