ironic post on social media

Does anyone ever notice the ironic post on social media outlets, and even sometimes on here.

Like, (don't put your dirty laundry on here)). and the one posting it is the most frequent in doing so with that type of posting.

Or something like, (hey, Don't you know it's to hard for people to tell the truth on here. It's much easier to just lie). and this poster, is the biggest lier you know.

It's like people try to tell other not to do what they do. but the can't even see what they are doing. but they must relieve it unconsciously. Weird!