To add a little more confusion, there are two words in Catalan for it. The map says “Pistatxo”, which is not wrong, but the synonym I and many people around me use is “festuc”, which coincidentally starts with F, so there goes your political border theory… or not!
If you use an online service to upload which towers you see, and get an approximate location as a response, then yes, it could be just ad bad from a privacy perspective. What these open databases allow is the possibility to download the whole tower database to your device, and then do the lookups locally.