Comment: Re:On no. 1 & 3: Never trust the client (Score 1) 265
Don't trust the client, store things like geolocation data and other such things server-side.
Uhm, where do you think you got those coordinates from in the first place?
TFA isn't talking about sending geoip data back to browsers to store it in a cookie, it's about getting GPS data from visitors, who will want to lie about it, e.g. to get free beers for logging in at a specific spot several days in a row.