Not really. All you have to do is have
Then you set up a PM between your main account and your puppets. Each account posts to the PM each day, and likes the posts made by each of your other accounts every day. Assuming someone really wanted to manipulate the system to get SEO following, they set up 6 accounts, and now each of those 6 accounts is getting likes from 5 different users each day. Those 6 accounts now reach the likes limit for TL3 within 4 days, and can maintain it without any help from anyone else indefinitely.
And let’s say that you block likes from PMs. Then you just make an on-topic post from each of those accounts in some random topic, and make sure to like those posts with your 5 other accounts.