Sometimes it is useful to show certain PII (Personally identifiable information) to other moderators when asking them for help. The most common case would be asking for help when dealing with sock puppets or vote fraud. Especially for new moderators, these can be difficult without help.

In the case that the other moderators are neither from the same site nor SE employees, sharing the link does not work. Making a screenshot would work, but then it has to be hosted somewhere. Imgur is the default image host for SE, but the images are publicly accessible if you know the URL. Now, the Imgur URLs are short enough that it is possible that user stumble upon random images. 

Is is acceptable according to SE policy and the moderator agreement for moderators to use Imgur to share images containing PII in the Teacher's Lounge? If not, how should moderators handle these cases?