I successfully concealed my fraternity membership during my med school application process. It worked for me.
Two years ago, some frat guy at Oregon State University was drinking his beer and minding his own business when some homeless guy was rummaging for cans in the frat dumpster to return to the grocery store for 5 cents a piece. Hey, a guy has got to make a living, right. Anyway, the frat guy got annoyed, took a big swig on his beer, went upstairs to his room, got his gun, and shot the homeless guy. Needless to say, the pub for the frat was not good.
And then, of course, all of the media stories of pledges dying of alcohol poisoning during the initiation process.
Yeah, leave it off.