All the things that we do on the Internet, whether publicly or secretly, are recorded by the Angels. Our intentions, our motives, the things that we post, what our eyes look at, what our ears listen to, the people we interact with - all and everything else besides.
They count as our deeds which will be taken for or against us in the Day of Judgment.
Nothing is ever hidden from Allah.
Let us not forget our consciousness of Allah, and the consequences of our actions in this world and in the Hereafter.