is this sort of behavior allowed around here?

sorry, still new to the place. have lurked over the years but never paid much attention to the do's and don'ts. so forgive me if this question is out of line or what.

i been reading several threads. many of them have some really long replies or some may have 20 or more photograps posted in one thread. then the user seeandsee comes in at some point, quotes all of the huge post or picture chain and then just replies with two thumbs up, lol's and other smilies.
i also checked his posting history and it looks like that is all he does. is this allowed and if so what is the point. i mean i would never click his banner because of how he acts this way so i would imagine the company that it links too must not care either or approve of what he does.