Nobody says you "better not" complain - only that the most effective form of complaint is to simply stop using the site that makes you complain, and possibly cease doing business with the owner in any form if it really gets your goat.  Rendo for example has many policies that I find highly annoying, but at the end of the day, they own the site and I do not, so I can either adapt to their policy or take my business elsewhere.  Complaining is valuable for the site host in that you're giving feedback that may be of use to them - but only to a point, and any decision remains with the site owner (the guy paying $100 a month out of his own pocket in this case).
ps: I'm a frequent complainer myself, I feel the pain of all complainers everywhere when their complaints aren't dealt with satisfactorily

My Freebies