1. Use a commenting system that is a bit different from the standard, so the bots can't use it. Wordpress comments already is well known by the bots, so it has to be a bit different
2. When the spammers figure out how to do it, or do it manually, one just has to delete for a few weeks manually
3. When enough users are on the site, one can then make the comments sign-up only.
But in my experience, if you write a custom comment field (or change the IDs), the spammers don't come for a very long time. It's always just bots who monitor RSS feeds broadcasters.
1. Use a commenting system that is a bit different from the standard, so the bots can't use it. Wordpress comments already is well known by the bots, so it has to be a bit different 2. When the spammers figure out how to do it, or do it manually, one just has to delete for a few weeks manually 3. When enough users are on the site, one can then make the comments sign-up only.
But in my experience, if you write a custom comment field (or change the IDs), the spammers don't come for a very long time. It's always just bots who monitor RSS feeds broadcasters.