acording to some of these tips I have acted wrong on some ocassions, tough it's more tolerant here and in those situations my aproach was probably best.
-one time on liberation day, basically the whole inner city is a festival terrain at liberation day, I entered the inner city and you had to go trough a checkpoint. they searched everyone, looking for weapons, and you also weren't allowed to take drinks with you(so the table at the checkpoint is often loaded with beercans, bottles water, etc)
I had a bag with a few grams weed in one pocket, zippo in the other(and also rolling papers, and some ordinary things like phone, wallet, keys etc)
I let them search me, they only asked to show my zippo(probably felt like it could be a weapon)
other time, in the city, we stood in front of our regular bar about to each go home, but just met some friends who came out the snackbar. some policemen come walking up the street, we just assume they'rte just walking around like usual. but turns out they're doing a weaponsearch, and are searching everyone on the street. weren't regular cops btw, but marechuasse(our customs/borderpolice)
my pockets were all stashed full, with things like my VG, grinder, dugout, weed, 3 jet lighters and a regular lighter, etc.
they searched me, asked if what I had in my pockets were my phone etc, didn't ask me to take anything out. one of my friends had a small pocketknife with him(uses it for his work, and he had worked that morning and still had it in his pocket), wich he told when they asked else they probably wouldn't have found it. so he got a fine, and latyer he told that he saw that the woman-cop who was writing down his info, had a grinder in her frontpocket. we don't know of it was hers or if she took it from someone, but it wasn't in an evidencebag(my friend's knife did go into one)
so in situations like mine where they are specifically searching for something that isn't weed, weapons in these cases, it would probably give you more trouble if you don't consent to a search. but maybe my situation is unique, since around here you will get more trouble if you have a knife with you on saturdaynight then 5 grams of weed(on going-out nights you aren't allowed to have any knife with you in the inner city, you get a fine if you do, but for up to 5 grams weed you can't get a fine, they can only impound it)