It's more noticible to me on places like /co/ and now /tg/. There's more than two levels of demarcation.
There are:
Boards with culture that ignore this stuff for the most part - /a/, /jp/, /m/, etc
Boards with 'culture' that are always fucking cesspits anyway so who cares - /v/, /b/, etc
Boards that actively tend to go the opposite, for better or worse - (better): /k/, (Worse): /pol/, /r9k/
Boards that don't have enough of a 'culture' because of being primary content redistribution - all the porn ones, /wsg/, etc
Boards that are like reading slightly watered down tumblr: /co/, to a lesser extent, now, /tg/, etc.
All i'm really lamenting is that /tg/ seems to be going from the first category to something else.
Sorry if i'm lifting the curtain on my thoughts and derailing blog too much, guys.