I've notice this post of yours in Reddit too.
Anyway those MP simply seek a boost of popularity, they will make some "noise" sure, but that all they can do. These days even the Molluscan doesn't have much of popularity in Nederland, they have presence sure but that all about it.
Dealing with them is similar how you deal with internet troll (which is basically what they are). All you need to do is "don't feed the troll" as in ignoring them while at the same time look for some incriminating details about them to be use at later time if needed, and also undermine their popularity in other front.