i dont know where you live in germany but would you say the same if your house was soaked deu to the heavy rainfall in the alps... i would say that you should have a "more water-proof" house...
you misinterpreted his post.
People had their 3DS bricked because they were using a launcher that has not 100% matching the MD5. No matter what flashcard you use, if the launcher presents any kind of problem your ds will be bricked.
please be careful when writing, to not misinform people. the 3ds doesn't get bricked if the md5 is simply wrong. an user tried to manually corrupt it many times and rebooted the console 30 times (he said), and no brick.
there are more security checks than just the md5 one.