Learn English – Adjective to describe something that tastes unpleasant because it has too many flavors

There's no specific term I know of that is used to describe adolescent people on The Internet. Here are some specific terms:

• Script kiddie refers to people who use scripts to attack computer systems. They are referred to in a derogatory manner as 'kiddies' (a slag term for 'kids' or 'children') because they typically do not have the skill to write the scripts on their own and have obtained them from another source and run them. They are often stereotyped as writing in the style you described (alternating case).
• newbie/noob/newb/nub refers to any person who is new to the activity in which they are participating. You can modify the adjective with a noun to specify the activity explicitly: an internet newb is someone who is new at using the Internet.
• Troll refers to any person on the internet who posts inflammatory content for the purpose of enticing anger or other negative emotions from people. They are often stereotyped as being younger people.

apperception.

1. Conscious perception with full awareness.
2. The process of understanding by which newly observed qualities of an object are related to past experience.

Moreover from "Dictionary of Philosophy" by Dagobert D. Runes:

In psychology,

apperception is "the process by which new experience is assimilated to and transformed by the residuum of past experience of an individual to form a new whole."

In short, it is to perceive new experience in relation to past experience.

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In epistomology,

"the introspective or reflective apprehension by the mind of its own inner states."