I just copy/pasted this from a post on reddit, I am the the OP but I urge anyone from the EU that has/had a reddit account to file a complaint about this.
Your privacy settings in your account don't work and with this Reddit collects your location data and a lot more. Try it out yourself. This affects 330 million people around the world.
Also this is illegal in the EU by our GDPR rules. This is a pdf with contacts per EU country to file a report to protect your data: http://ec.europa.eu/newsroom/just/document.cfm?doc_id=48619
Please drop this everywhere you can to make people aware of this. Your data is your data and this is a serious violation of your privacy.
Here is a reddit post about it. You can also find more in /r/Privacy.