Dear forum participants "Guest": It's so easy to create a pseudonym here in the forum, you personally have a lot of "Gudis".
So: "GAST" should only be allowed in exceptional cases, it's kind of impersonal - isn't it?
I'm sure every forum participant has already been to Migros, 90% of whom have a Cumulus number (so somehow not anonymous either - i.e. "guest").