You can bounce this around the forums all day long, some people will tell you not to worry others will tell you to be cautious. At the end of the day why take pointless risks, assume it's flagged and clean house. They clearly nabbed a few in transits, they know the originator source is a SR vendor, you would be fucking crazy to just assume nothing will happen. No one has ever regretted being over cautious (I think that's an astor quote), many have regretted not being cautious enough though, your call mate but I know what I would be doing.