hm.well i am an Newgrounds user. that should pretty much talk for itself,
unlike many MANY artists here in DA, im not scared of criticism or harsh words and block someone who says anything but kiss assing compliments, infact i enourage them more then just simple compliments
so i dont block someone whos actually trying to help me or is a bit harsh but fair
still, pepole who are like "LOL YOU SUCK" "YOU ART IS SHIT"<without explaining HOW its shit. well those are ..dont really care about them , but if someone sticks for multipe artworks to keep trolling, then yeah, block