Overuse of bold markup, particularly to begin each bullet point.

Overuse of "Here's..." to introduce or further every concept or idea.

A few parts of this article particularly jump out, such as the 2 lists following the "The SMS Flooding Attack" section (which incidentally begins "Here's where..."). A human wouldn't write them as lists (the first list in particular), they'd be normal paragraphs. Short bulleted lists are a good way to get across simple bite-sized pieces of information quickly, but that's in cases where people aren't going to read a large block of text, e.g. in ads. Overusing them in the wrong medium, breaking up a piece of prose like this, just hurts its flow and readability.