app for AUTOMATICALLY FOLLOWing somebody - legit?

[DonSolare]

Hi there,

I found this guy that says:

NOTE: YOU'LL CONNECT AND AUTOMATICALLY FOLLOW
@DAWESTHEBAND ON SPOTIFY WHEN YOU ADD A BAND!

https://www.tweematic.com/favoritebands/

So I assume that it is OK to make an app for automatically following somebody when clicking - provided you say what is going to happen. Right? It sounds strange to my ears... but seems to be true.