Valve Employees will never ask you for personal or account information, on Steam or anywhere else. You can safely ignore anyone who claims to have mistakenly reported you - that will not get you banned. If you need help with your Steam account, go to https://help.steampowered.com/.
yahn
Yahn Bernier   Seattle, Washington, United States
 
 
Programmer @ Valve

NOTE: If you get a Steam private message supposedly from me (or anyone alleging they are from Valve/Steam) about "massive reports on your account regarding hacks" it is not from me but someone trying to impersonate me and hack your account. I don't do Steam support and Steam support would never reach out to you in this fashion. Don't be fooled.
Currently Online