I looked on the wiki, and there I counted 307 badges. (Okay, I cheated. I copied and pasted the list onto word and counted the amount of lines on the first page and multiplied by the number of pages. There was one less on the last page, so I subtracted one, and viola! A maximum of 307 badges, roughly. I think there are a couple more not yet on there though, sooo.)
Who wants to be the one to find somebody with 307 badges?