I have read that in Germany police is allowed to make provocations, so normally it probably wouldn't happen. Polish inside security (ABW) also did this kind of provocation I remember, there was planned budget cutting so they found one guy with radical views and persuaded him to prepare explosives. Honestly finding such person in Poland isn't very hard task as we have bad government and people hate them. But those provocations aren't signs that there is coup danger, rather this is business of government agencies, there are always people who would willingly join such conspiracies.