They are probably trying to indicate that what they have just said, was said in jest, or not to be taken too seriously. The laugh may be even to cover up some embarrassment that the speaker is feeling over what he or she has said.
Some people are able to laugh at themselves, is graphically correct.
A sentence beginning with laugh is an order.
Example sentence - It is easy to laugh with her.
They laugh at me when I fall down the stairs.
It has a subject (you). It has a verb (laugh). It expresses a complete thought. Looks like a sentence to me.
The wealthy people taunt and laugh at the proletariats.
Because if people are having fun/laughing XD is representing a laugh.
His pathetic efforts at hitting the target made some people laugh.
"Laugh" is the subject of the sentence, which in normal word order ( and proper sequence of tenses ) is: Her laugh is what I loved most about her. Her laugh is what she did when she was happy and amused - as in Ha, Ha, Ha Grammatically it is a noun
The answer is simply: For example; Will she laugh at this answer? Probably not!
I always laugh at good jokes.
My friend told me a joke, it made me laugh! Clowns make me laugh!