This is something we didn’t think about. We actually do not require a bio but have seen a large portion of our faculty include one. A few factors lead me to believe that this isn’t a big issue (at least for us). Most faculty are accustomed to the process of filling out a disclosure and submitting a bio in whatever activity they participate in. We have continuously seen how many of the faculty take pride in their set of skills and knowledge that they offer their info for self promotion. We have seen resumes and novel size amounts of information included and maybe our challenge may be to create some sort of uniform set of info. But we are not there yet with that, it was a challenge implementing the process so it was nice that our faculty voluntarily included their bios.
I would suggest creating a form of communication that would include how to create a bio, how to go back into the profile to make edits and include a disclaimer that states that all bios created are public view.
I think for the most part it will self police itself.