I've seen him delete tweets seconds after posting.

In one, he explained how he had worked in electronic warfare and was relating his experience to his thesis for Softwar. Boom, gone in 2 seconds.

I have a hunch that his social media is followed very closely by the govt and he is told to remove things (or they are removed for him) when he says things that make his employer nervous. Totally makes sense. He has plenty of privileged information!

As far as attention grab, he is honest about blocking people that argue with him for the purpose of angering them and making the issue go viral. Apparently it worked. He gamified online rage in order to spread his thesis. Cant blame him... it did work to spread his thesis.