Absolutely blame the people who are renting out their apartments. Bring it up at the association meeting. I'm in favor of AirBNB but rules within the building you own is legit.
Problem is that there's no association - every flat is owned freehold and there is nobody who manages the building. However, any action that three households agree on becomes legally binding for every occupant. (This is just how it works in Scotland!)
Now I'm just curious how this works. Isn't there shared infrastructure that somebody must take care of? That there could be a dispute over?