1. Your boarding pass
We've blurred out the traveler's name in the image above, but the fact of the matter is that this photo contains all the information necessary to access and change the ticket. Sharing a photo with any personal or travel details is an open invitation for strangers to alter your plans. If you absolutely must Instagram an airline ticket, download an app like TypoInsta for a blurring/erase/strike-out tool.
2. Your hotel room
This is completely a question of safety. To minimize the prospect of unwanted visitors, wait until you've checked out of a hotel before sharing images of your room. Of course it's exciting to stay in a photogenic property, but a photo of a room and a geotagged location is just short of handing strangers your key card. The internet is full of far too many scary tales of ill-willed, smooth-talking types discovering room numbers.
3. Gross travel scars
Gross. As much as a scar can be a badge of honor after an exhilarating experience abroad, a photo of the bloody or damaged body part is definitely not what your friends and followers want to see when they open up the Instagram app. Save it for a private message to your best friends, if it really needs to be documented. Above is a very innocent snap of a broken toe and the surf instructor's makeshift bandage; Instagram is already full of enough out-of-focus feet, thank you very much.
4. Illicit or explicit activities
Instagram is still the internet, and everything that goes onto the internet is there forever. Just keep that in mind when sharing photos of a wild weekend in Amsterdam (above), or skinny-dipping at a nude beach on Corsica, or anything else you may not want parents/potential employers/coworkers/significant others to see.
*A few general safety rules to remember when using Instagram while traveling:
· Consider potential privacy comprises.
· If yours is a public account (as most are), then your photos could end up on the "popular" or "explore" pages, for all other Instagrammers to see.
· Geotagging locations and posting from afar broadcasts that you're not at home.
[Photos: Instagram, linked]