Facebook users who are asked to like, share, and comment "#Ant" on posts in order to see ants crawling over their screens should not do so. This is because the posts have been created by scammers, and Facebook users who follow the instructions in the fake posts run the risk of, scammers collecting and using their publicly available Facebook information in scams, or being placed on spamming lists.
Liking, sharing and commenting "#Ant" on the Facebook posts will cause ants to start crawling on your screen. I have tried it. After trying it I immediately deleted my comment, remove my "like" and share.
The Facebook Comment #Ant and it Will Work for You" Like-Farming Scam
Omg this one actually works
Follow the steps:
Step 1. Like this post
Step 2. Share this post
Step 3. Comment #Ant and it will work for you

This collecting of information by scammers is another like-farming, data mining or information-mining scam that we have seen before, which collects Facebook users' publicly available information for scammers and spammers. Once scammers have gotten a hold of the information, they will use it to make their scams more convincing to their potential victims, by referring to them by their names and providing them with information that they think only people that they know, would know.
For the spammers, users’ information is like gold. They will continuously send unsolicited messages and emails to their victims. So, Facebook users should be careful of what they like, share and comment on.
Facebook users, who have already liked, commented on, or shared similar posts, can opt out by clicking here for instructions.