Hrm... annoying online habits?
* Listing occupation as "Annoying Bastard".

* Replacing with c's with k's (e.g. 'krashkart')

* Forum topics titled "HELP ME PLEEEEEEEEaaaaaaAAAAaZE!!!!!!!" or similar
* Spelling 'the' as 'teh' deliberately and with great frequency
* The inherent lack of lolwhales on the internet
That last one is more a gripe... sosumi.
EDIT: Edited to assuage Gargamel's grief.
There are still no lolwhales on the internet.