It will only actually be "bad" if the costs (losing some people with ad-blockers which are like dead weight to them anyway) outweighs the benefits (being able to force their ads to regular visitors and discourage them from adopting ad-blockers).

Otherwise, it's mostly "don't let the door hit you on your way out" case.

I suspect there are network effects of pushing out users who use ad blockers. These people, who will feel frustrated with their experience on your site, might not share your articles to other users, who in turn might not have those ad blockers installed.