Open letter to Thesaurus.com

Noting an unusual interest amongst a2k participants in the written word

http://able2know.org/topic/191041-1

, herewith one of my pet peeves as an erstwhile writer: I frequently note omissions in

http://thesaurus.com/

Just this morn I note in this treasure trove of synonym for instance: none for dumb, dumbing, dumb down in the verbal sense as to trivialize or condescend

http://en.wiktionary.org/wiki/dumb_down?rdfrom=Dumb_down

Yet the site evidently has no facility for reports of this sort as its “Contact us” gets you to an advertising facility. Does anyone else share my fanaticism as an erstwhile writer and if so have you found a way to access the appropriate staff with suggestions of this sort