I don't think they are meant as pure toys, more like a decoration on those ink stamps. I wouldn't worry too much about it...
Besides, if Playmobil was to react on every toy with similar properties that is on the market they would do overtime. I remember the fuss about the Airgamboys in the Netherlands, that already had a roman theme of their own, even before Playmobil considered of creating their romans and the Airgamboys had to be pulled out of the stores as a result. Several months later Playmobil launched their romans, with accessories that looked quite like the ones from Airgamboys. It may be harsh to say, but in this case I found Playmobil a bit hypocritical. But that is my opinion...