Irrelevant. Pointless based on their lack of knowledge. Not to be taken seriously
Irrelevant (-rl-vnt): Not pertinent to the point. Not relating to the subject.
Here's another one:
Unwise (n-wz): being a smartass to a moderator who is politely telling you to stop insulting other people here simply because you disagree with their opinion.
Now let's get back to making posts relevant to this the topic.