If he's using an ad blocker he may in fact not be seeing it. However, that is no excuse for him to be lazy. Your signature as well as the signatures of others on the forum clearly mention the new requirements to see links. If he had used the search engine the site has he would have found the thread where you mention the new plugin.
You can't please everybody. Even when you provide a solution that makes things easier on them, people like this guy choose to bitch and whine. Perhaps if he actually read the forum he'd know about the Like button. But, that requires patience from people who think they're entitled to things without earning them.