Hey guys, sorry for my very late reaction !
I'm from Amsterdam, The Netherlands. There's no law that forbids you to take these photo's. Except from towers that are put on private property, in that case you could be arrested for trespassing.
Now the funny thing is, these towers are located at the fields of some farmers (private property), but I was standing between the 2 farms on a bycicle path...so that's a public road, nothing to be afraid of luckily.
Regarding safety, nowadays there still people having their houses below a 220/380KV tower, but the goverment is offering them money to move or buy another house..so thats good news.
Thanks for all the compliments guys !