Yep - YikYak did let you do this after a while, but if you check the subreddit for YikYak they rolled this change out along with a feature that meant you had to

Yep - YikYak did let you do this after a while, but if you check the subreddit for YikYak they rolled this change out along with a feature that meant you had to give or an email or phone number IIRC. Huge backlash and people stopped using it. I tried to solve this in Ottr but letting a "Explore". They could open a map, drop a pin and that would be their new location. If they posted while "Exploring" their post would be marked as such.