If the worst article someone can find when cherry picking to discredit the policies of the EU (not knowing that he's actually just talking about one Country) is about a single incident in which a man was not arrested and was quickly released then I think we're fine.
...it might've just been better if the guy wrote "Man arrested for having large muscles" and just provided the link + story, like a normal person does on these forums.
Haven't read through all the posts, but maybe the police officer was just curious if he even lifts...
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2. Police men/women are not different then any other person in said country
Now for the rest, yes they can bring you in for suspicion of use/trade/whatever drugs, they can't arrest you, but they can bring you in for checking. You can refuse it, but well...that certainly doesn't help the situation.